Quantum Journals

Learning encodings by maximizing state distinguishability: variational quantum error correction

Tue, 01 Sep 2026 23:00:00 +0000

reply.relevance=9 reply.impact=8 Highest h-index author on this paper: Andreas Maier (h-index 55) That author's affiliation: Friedrich-Alexander-Universität Erlangen-Nürnberg Institution (first & last author): Fraunhofer Institute for Integrated Circuits Quantum error correction is crucial for protecting quantum information against decoherence. Traditional codes like the surface code require substantial overhead, making them impractical for near-term, early fault-tolerant devices. We propose a novel objective function for tailoring error correction codes to specific noise structures by maximizing the distinguishability between quantum states after a noise channel, ensuring efficient recovery operations. We formalize this concept with the distinguishability loss function, serving as a machine learning objective to discover resource-efficient encoding circuits optimized for given noise characteristics. We implement this methodology using variational techniques, termed variational quantum error correction. Our approach yields codes with desirable theoretical and practical properties and surpasses standard codes of comparable size under structured noise. We also provide proof-of-concept demonstrations on IBM and IQM hardware devices, highlighting the practical relevance of our procedure.

Antidots measure anyonic charge in graphene

Fri, 21 Aug 2026 00:00:00 +0000

reply.relevance=9 reply.impact=9 Anyons are fractionally charged quasiparticles of the quantum Hall effect, and could one day power topological quantum computers. Trapping and measuring anyons remains difficult, but quasiparticle charges have now been measured using a gate-defined antidot in bilayer graphene. For hole-conjugate states, the parity of downstream integer edge modes sets the observed charge.

Ultra low overhead syndrome extraction for the Steane code

Mon, 17 Aug 2026 23:00:00 +0000

reply.relevance=9 reply.impact=9 Highest h-index author on this paper: Aleks Kissinger (h-index 21) That author's affiliation: University of Oxford Institution (first & last author): University of Oxford We establish a new performance benchmark for the fault-tolerant (FT) syndrome extraction of the Steane code with a dynamic protocol. Our method is built on two highly optimized circuits derived using fault-equivalent -rewrites: a primary FT circuit with 14 CNOTs and an efficient non-FT recovery circuit with 11 CNOTs. The protocol uses an adaptive response to internal faults, discarding flagged measurements and falling back to the recovery circuit to correct potentially detrimental errors. Monte Carlo simulations confirm the efficiency of our protocol, reducing the logical error rate per cycle by an average of relative to the optimized Steane method Rodatz et al (2025 arXiv:2506.17181) and compared to Reichardt’s three-qubit method Reichardt (2020 Quantum Sci. Technol.6 015007), the leading prior techniques.

Fast and sensitive readout of a semiconductor quantum dot using an in situ microwave resonator with enhanced gate lever arm

Fri, 14 Aug 2026 10:00:00 +0000

reply.relevance=9 reply.impact=8 Highest h-index author on this paper: Anonymous (h-index 0) Institution (first & last author): Unknown Quantum dot–based spin qubits require ultrafast, high-fidelity charge readout for quantum error correction and real-time feedback. Improving readout sensitivity has often required complex high-impedance resonators or specialized circuits. This work shows that optimizing a gate lever arm directly coupled to an in situ superconducting microwave resonator dramatically enhances readout sensitivity, achieving integration times at the tens of nanoseconds scale without the use of high-impedance devices, and revealing how readout noise evolves across distinct physical regimes. These results show a practical route toward faster, more scalable architectures for fault-tolerant quantum computing.

Impact of gate-voltage noise on silicon spin-qubit variational quantum eigensolvers

Tue, 11 Aug 2026 23:00:00 +0000

reply.relevance=9 reply.impact=8 Highest h-index author on this paper: Jonathan Baugh (h-index 30) That author's affiliation: University of Waterloo Institution (first & last author): University of Waterloo Quantum computers offer a route to outperform classical methods in tasks such as molecular simulation, motivating hybrid algorithms like the variational quantum eigensolver (VQE) for near-term devices. Silicon spin qubits are a promising platform for scalable quantum computation, but their performance is limited by hardware imperfections—most notably charge-noise–induced potential fluctuations and static miscalibration of gate-electrode voltages—which degrade quantum gate fidelities and, ultimately, algorithmic accuracy. Here we develop a hardware–algorithm co-simulation framework for silicon quantum-dot processors that links 3D electrostatics to effective -factors and exchange couplings, and propagates voltage-level noise through realistic control pulses. Using VQE for ground-state energy estimation as a circuit-level testbed, we study both static scaling/offset errors on the gate-electrode voltages and stochastic fluctuations modeled as random-telegraph noise with tunable amplitudes and switching times. At the gate level, we show that exchange-based two-qubit gates are roughly an order of magnitude more sensitive to these types of noise than ESR-driven single-qubit rotations. Quantum process tomography and Kraus-operator analysis further distinguish coherent and incoherent contributions and quantify the fraction of error that is, in principle, correctable by a compensating unitary. Embedding these noise models into the VQE circuit, we identify regimes of miscalibration strength and noise switching time compatible with chemically accurate energy estimates, and discuss how statistical post-processing based on the full distribution of noisy energy estimates could further improve accuracy.

Fast Design and Scaling of Multiqubit Gates in Large-Scale Trapped-Ion Quantum Computers

Fri, 31 Jul 2026 10:00:00 +0000

reply.relevance=9 reply.impact=8 Highest h-index author on this paper: Anonymous (h-index 0) Institution (first & last author): Unknown A new polynomial-time method designs fast, robust, programmable multiqubit entanglement gates across hundreds of trapped-ion qubits, offering a scalable route to large ion-crystal quantum computers.

Self-dual bivariate bicycle codes with transversal Clifford gates

Wed, 15 Jul 2026 00:00:00 +0000

reply.relevance=9 reply.impact=9 Highest h-index author on this paper: Yuan Chen (h-index 24) That author's affiliation: Peking University Institution (first & last author): Peking University Self-dual bivariate bicycle codes with transversal Clifford gates

All-mechanical coherence protection and fast control of a spin qubit

Wed, 15 Jul 2026 00:00:00 +0000

reply.relevance=8 reply.impact=7 Silicon–vacancy spins can be used in phononic quantum devices, but improvements in coherence times are still required. It has now been shown that the spin coherence can be protected by continuous driving using acoustic waves.

Universal gates from braiding and fusing anyons on quantum hardware

Wed, 15 Jul 2026 00:00:00 +0000

reply.relevance=9 reply.impact=9 A 54-qubit realization of non-Abelian S3 topological order demonstrates that combining anyon braiding with fusion enables universal topological quantum computation.

Quantum-based self-attention mechanism for hardware-aware differentiable quantum architecture search

Tue, 16 Jun 2026 10:00:00 +0000

reply.relevance=6 reply.impact=5 Highest h-index author on this paper: Anonymous (h-index 0) Institution (first & last author): Unknown The automated design of parameterized quantum circuits for variational algorithms in the noisy intermediate-scale quantum (NISQ) era faces a fundamental limitation, as conventional differentiable architecture searches rely on classical models that fail to represent quantum gate interactions adequate…

Rigid $4π$-periodic supercurrent induced by interference of chiral Majorana modes in cascaded quantum anomalous Hall insulator Josephson junctions

Tue, 16 Jun 2026 10:00:00 +0000

reply.relevance=9 reply.impact=8 Highest h-index author on this paper: Anonymous (h-index 0) Institution (first & last author): Unknown The fractional Josephson effect (a $4π$-periodic current-phase relation, CPR) serves as a definitive signature of topological superconductivity mediated by chiral Majorana modes (CMMs). Here, we propose a cascaded topological heterostructure comprising two stacked proximity-induced topological super…

Non-perturbative topological gadgets for many-body coupling

Mon, 15 Jun 2026 23:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: Nicholas Chancellor (h-index 19) That author's affiliation: Newcastle University Institution (first & last author): Newcastle University Continuous-time quantum hardware implementations generally lack the native capability to implement high-order terms that would facilitate efficient compilation of quantum algorithms. This limitation has, in part, motivated the development of perturbative gadgets—multi-qubit constructions used to effect a desired Hamiltonian using engineered low-energy subspaces of a larger system constructed using simpler, usually two-body, primitives. In this work, we demonstrate how a class of non-perturbative gadgets can produce high-order multi-body interactions by taking advantage of the odd–even properties of topological defect subspaces. The simplest example uses domain-wall defects in an effective Ising spin chain with linear connectivity and three-body couplings, alongside three- or five-body driving terms depending on the intended use. We demonstrate a version of a gadget which can perform an encoded bit-flip operation on a minor embedding chain, an important task to mitigate the limitations of quasi-two-dimensional (also sometimes called quasi-planar) topology. Although this will be the main focus of the paper due to conceptual simplicity, there exist systems constructed with only two-body couplings where the boundaries determine whether there are an odd or even number of defects, namely ice-like systems which may yield more complex gadget-like constructions.

Adaptive time compressed QITE (ACQ) and its geometrical interpretation

Mon, 15 Jun 2026 23:00:00 +0000

reply.relevance=7 reply.impact=6 Highest h-index author on this paper: Carmen G. Almudéver (h-index 22) That author's affiliation: Universitat Politècnica de València First author institution: Universidad Cardenal Herrera CEU Last author institution: Universitat Politècnica de València Imaginary time evolution (ITE) is a well-established method for ground-state preparation, a fundamental problem in many fields such as materials science, chemistry, and optimization. Quantum ITE (QITE) approximates this evolution on quantum hardware but suffers from high circuit depth and numerous measurements. In this work we introduce adaptive-time compressed QITE (ACQ), a novel algorithm that reduces resource-cost by combining adaptive time steps with circuit compression. This approach leverages geometric insights by characterizing its relationship to geodesic trajectories with a measure that distinguishes trajectories in . Recalling that ITE is a gradient flow on the complex projective plane , such trajectory measures allow one to measure the deviation from geodesicity of said flow. For Hamiltonians with only two distinct eigenvalues (spectral cardiality), ITE and QITE exactly trace geodesics, this fact motivates an adaptive strategy for systems whose corresponding spectral cardinality is greater than 2, where QITE unitaries are reused until an energy increase signals departure from the ITE path. This is implemented via a line search for energy minimization. Circuit compression is achieved by approximating the sequence of QITE unitaries with a single element of a one-parameter group. Numerical simulations on the transverse field Ising model and the Heisenberg model demonstrate that ACQ achieves comparable fidelity to standard QITE while significantly reducing the number of QITE optimizations and maintaining fixed circuit depth during propagation. Gate-count estimates and an analysis of the fidelity scaling with truncation parameters are provided. A gate count and performance comparison with the state of the art method double bracket QITE is also performed.

A quantum state transfer protocol with Ising Hamiltonians

Thu, 11 Jun 2026 23:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: Arnau Riera (h-index 14) That author's affiliation: Qilimanjaro Quantum Tech First author institution: Universitat de Barcelona Last author institution: Qilimanjaro Quantum Tech Quantum state transfer (QST) is a fundamental requirement for scalable quantum computation, where fast and reliable communication between distant subsystems is essential. In this work, we present a protocol for QST in linear Ising chains. Starting from a perfect state transfer scheme via a Heisenberg Hamiltonian with inhomogeneous couplings, we adapt it for architectures implementing the transverse-field Ising model by encoding the information in domain walls. The resulting linear Ising chain makes quantum transport experiments accessible to many platforms for analog quantum simulation. We test the protocol for 1-, 2-, and 3- spin states, obtaining high transfer fidelities of up to 0.99 and study the accuracy dependence on the domain wall approximation. These results are the first step in paving the way for an experimental implementation of the protocol.

Quantum optical shallow networks

Thu, 11 Jun 2026 23:00:00 +0000

reply.relevance=7 reply.impact=8 Highest h-index author on this paper: Seth Lloyd (h-index 97) That author's affiliation: Moscow Institute of Thermal Technology Institution (first & last author): University of Pavia Classical shallow networks are universal approximators. Given a sufficient number of neurons, they can reproduce any continuous function to arbitrary precision, with a resource cost that scales linearly in both the input size and the number of trainable parameters. In this work, we present a quantum optical protocol that implements a shallow network with an arbitrary number of neurons. Both the input data and the parameters are encoded into single-photon states. Leveraging the Hong–Ou–Mandel effect, the network output is determined by the coincidence rates measured when the photons interfere at a beam splitter, with multiple neurons prepared as a mixture of single-photon states. Remarkably, once trained, our model requires constant optical resources regardless of the number of input features and neurons.

Observation of exact quantum critical states

Tue, 09 Jun 2026 00:00:00 +0000

reply.relevance=9 reply.impact=8 Anderson localization allows critical states between localized and extended regimes, but observing them is difficult. Now critical states are experimentally realized in a superconducting-qubit simulator implementing a quasiperiodic lattice model.

Encoding orbital angular momentum of light in space with optical catastrophes

Mon, 08 Jun 2026 00:00:00 +0000

reply.relevance=9 reply.impact=8 Highest h-index author on this paper: Cheng‐Wei Qiu (h-index 136) Institution (first & last author): Unknown By shaping optical caustics with metasurfaces, the authors sculpt the orbital angular momentum (OAM) of light in 3D space. This strategy supports hidden OAM states, and enables multidimensional optical encryption.

Soft-X-ray momentum microscopy of nonlinear magnon interactions

Fri, 05 Jun 2026 00:00:00 +0000

reply.relevance=9 reply.impact=8 Highest h-index author on this paper: Dirk Grundler (h-index 52) Institution (first & last author): Unknown Short-wavelength magnons and their couplings are difficult to detect, limiting studies of nanoscale spin dynamics. Now a method using soft X-rays to image magnon momentum captures their nonlinear interactions with nanometre-scale sensitivity.

Impact of current-induced magnons on spin-orbit-torque analysis

Thu, 04 Jun 2026 10:00:00 +0000

reply.relevance=7 reply.impact=6 Highest h-index author on this paper: Anonymous (h-index 1) Institution (first & last author): Unknown The second-harmonic Hall technique is a widely used, sensitive method for studying the spin-orbit torques generated by charge current. It exploits the dependence of the Hall resistance on the magnetization direction, although thermal phenomena also contribute. Historically, deviations from the expec…

Plasmonic metasurfaces for spin-selective optical vortex generation and transverse bifocusing

Thu, 04 Jun 2026 10:00:00 +0000

reply.relevance=9 reply.impact=7 Highest h-index author on this paper: Anonymous (h-index 1) Institution (first & last author): Unknown Spin-decoupled metasurfaces hold significant potential for integrated photonics by enabling independent manipulation of the spin degree of freedom of light. However, achieving robust spin-decoupled performance over both a broad bandwidth and a wide range of incident angles remains a pivotal challeng…

Suppression of coherent light scattering in a three-dimensional atomic array

Tue, 02 Jun 2026 00:00:00 +0000

reply.relevance=9 reply.impact=8 Highest h-index author on this paper: Yu‐Kun Lu (h-index 20) That author's affiliation: Massachusetts Institute of Technology Institution (first & last author): Massachusetts Institute of Technology Periodic atomic arrays can modify collective light scattering, but most studies have focused on one- and two-dimensional systems. Now experiments with a three-dimensional array show strong omnidirectional suppression of coherent light scattering.

Fully passive received quantum access network based on reference-frame-independent quantum key distribution

Mon, 01 Jun 2026 00:00:00 +0000

reply.relevance=9 reply.impact=8 Highest h-index author on this paper: Yuehua Chen (h-index 36) That author's affiliation: Sun Yat-sen University Institution (first & last author): Sun Yat-sen University Fully passive received quantum access network based on reference-frame-independent quantum key distribution

Single- and two-mode magnon thermal squeezing

Mon, 01 Jun 2026 00:00:00 +0000

reply.relevance=9 reply.impact=8 Highest h-index author on this paper: Eiji Saitoh (h-index 82) That author's affiliation: The University of Tokyo Institution (first & last author): The University of Tokyo Obtaining squeezed states in magnets are a key challenge for future spin-based sensing and information technology. Now thermal squeezing of magnons, where noise drops below thermal levels, is shown in a ferrimagnetic insulator device.

A directional nanoantenna design based on a hybrid plasmonic waveguide: theoretical analysis for biosensing applications

Mon, 01 Jun 2026 00:00:00 +0000

reply.relevance=7 reply.impact=5 Highest h-index author on this paper: Abdolali Abdipour (h-index 23) Institution (first & last author): Unknown A directional nanoantenna design based on a hybrid plasmonic waveguide: theoretical analysis for biosensing applications

Photonic-integrated quantum sensor array for microscale magnetic localisation

Thu, 28 May 2026 00:00:00 +0000

reply.relevance=9 reply.impact=8 Highest h-index author on this paper: John Rarity (h-index 61) Institution (first & last author): Unknown Arrays of NV centres operating in parallel promise advantages in resolving spatio-temporal dynamics. Here, the authors report an array of eight localised NV-ensemble sensors integrated in silicon nitride photonic circuits with simultaneous readout and demonstrate applications to magnetic localisation and position tracking.

Metamaterial-enhanced near-field radiative heat transfer

Wed, 27 May 2026 00:00:00 +0000

reply.relevance=7 reply.impact=6 Near-field radiative heat transfer between silicon nitride membranes is enhanced several-fold by using metamaterials, opening opportunities for thermal energy harvesting and infrared sensing applications.

QAGO: evolving quantumness through genetic optimization of quantum circuits

Tue, 26 May 2026 00:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: Samrat Mondal (h-index 19) Institution (first & last author): Unknown Designing expressive yet hardware-efficient quantum circuits remains a central challenge in quantum machine learning (QML). Existing approaches to quantum circuit synthesis primarily optimize for classical performance metrics, often overlooking intrinsic quantum characteristics that govern circuit quality and generalization. This work introduces a quantumness-aware genetic optimization (QAGO) framework for circuit synthesis that integrates quantum properties such as entanglement and non-Clifford gate utilization into the evolutionary design process. We formulate circuit synthesis as both a single-objective optimization (SOO) and a multi-objective optimization (MOO) problem within a genetic framework. The SOO formulation explores quantumness-aware objectives balancing predictive performance and circuit-level quantum structure, while the MOO formulation approximates Pareto-efficient trade-offs between these goals. This dual perspective enables systematic analysis of how increasing quantum expressivity influences predictive behavior and resource cost. Experimental evaluations across three quantum kernel-based algorithms include quantum support vector machines, quantum kernel trainers, and projected quantum kernels demonstrate that circuits evolved under quantumness-aware objectives consistently outperform baseline kernel circuits such as ZZFeatureMap. Comprehensive benchmarking against classical baselines shows that QAGO achieves up to 2.5% area under the ROC curve improvement on the Higgs Boson dataset and 1.5%–9.2% gains across six of nine targets in the LIT-PCBA drug discovery benchmark. Compared to prior work (Wu et al 2021 J. Phys. G: Nucl. Part. Phys.48 125003, Mensa et al 2023 Mach. Learn.: Sci. Technol.4 015023) QAGO yields up to 4% improvement on Higgs and 5%–20% gains across eight of nine targets. These results provide quantitative evidence that optimizing for quantumness enhances both performance and quantum expressivity of QML models, establishing QAGO as a principled framework for quantumness-aware circuit evolution.

Scalable preparation of matrix product states with sequential and brick wall quantum circuits

Tue, 26 May 2026 00:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: Tomasz Szołdra (h-index 3) Institution (first & last author): Unknown Preparing arbitrary quantum states requires exponential resources. Matrix product states (MPS) admit more efficient constructions, particularly when accuracy is traded for circuit complexity. Existing approaches to MPS preparation mostly rely on heuristic circuits that are deterministic but quickly saturate in accuracy, or on variational optimization methods that reach high fidelities but scale poorly. This work introduces an end-to-end MPS preparation framework that combines the strengths of both strategies within a single pipeline. Heuristic staircase-like and brick wall disentangler circuits provide warm-start initializations for variational optimization, enabling high-fidelity state preparation for large systems. Target MPSs are either specified as physical quantum states or constructed from classical datasets via amplitude encoding, using step-by-step singular value decompositions or tensor cross interpolation. The framework incorporates entanglement-based qubit reordering, reformulated as a quadratic assignment problem, and low-level optimizations that reduce depths by up to and CNOT counts by . We evaluate the full pipeline on datasets of varying complexity across systems of 19–50 qubits and identify trade-offs between fidelity, gate count, and circuit depth. Optimized brick wall circuits typically achieve the lowest depths, while the optimized staircase-like circuits minimize gate counts. Overall, our results provide principled and scalable protocols for preparing MPSs as quantum circuits, supporting utility-scale applications on near-term quantum devices.

Angle-based fluorescence thermometry with high sensitivity and high resolution

Fri, 22 May 2026 00:00:00 +0000

reply.relevance=6 reply.impact=5 A plasmonic grating-based thermometer translates temperature into fluorescence emission angle shifts. This non-contact method achieves 0.01 °C resolution and effectively isolates thermal signals from environmental interferences.

Nondestructive Optical Readout and Manipulation of Circular Rydberg Atoms

Wed, 20 May 2026 10:00:00 +0000

reply.relevance=7 reply.impact=7 Highest h-index author on this paper: Anonymous (h-index 1) Institution (first & last author): Unknown Local quantum nondemolition measurements and optical manipulation of long-lived circular Rydberg atoms are demonstrated by coupling them to an auxiliary array of low-angular-momentum Rydberg atoms.

Mapping the positions of Two-Level-Systems on the surface of a superconducting transmon qubit

Wed, 20 May 2026 00:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: Jürgen Lisenfeld (h-index 24) That author's affiliation: Karlsruhe Institute of Technology Institution (first & last author): Karlsruhe Institute of Technology Mapping the positions of Two-Level-Systems on the surface of a superconducting transmon qubit

Full quantum work statistics for non-homogeneous many-body systems

Wed, 20 May 2026 00:00:00 +0000

reply.relevance=9 reply.impact=8 Highest h-index author on this paper: Francesco Plastina (h-index 33) Institution (first & last author): Unknown The non-equilibrium thermodynamics of interacting quantum many-body systems is investigated within the framework of thermal time-dependent density functional theory (DFT) using a generalized linear-response formulation for the full quantum work statistics. A first-principles route is established to reconstruct the relaxation function that underlies linear-response theory, thereby moving beyond phenomenological descriptions and enabling a consistent evaluation of all moments of the dissipated-work distribution in interacting systems. The predictive power of the approach is demonstrated for the Hubbard model subject to a staggered external potential, where the evolution of the relaxation dynamics during the Mott-to-band-insulator crossover reveals how distinct many-body phases shape the out-of-equilibrium thermodynamic response. These results provide a microscopic and transferable framework for quantum thermodynamics in correlated systems, bridging thermal DFT and non-equilibrium work statistics.

Nonlinear atomic tunnelling boosted by bright squeezed vacuum

Wed, 20 May 2026 00:00:00 +0000

reply.relevance=9 reply.impact=8 Bright squeezed vacuum light boosts nonlinear atomic tunnelling ionization more than 20-fold compared with coherent light, enabling quantum control of strong-field processes without increasing classical intensity.

Entanglement-enabled image transmission through complex media

Tue, 19 May 2026 00:00:00 +0000

reply.relevance=7 reply.impact=8 Highest h-index author on this paper: Hugo Defienne (h-index 20) That author's affiliation: Centre National de la Recherche Scientifique Institution (first & last author): Centre National de la Recherche Scientifique Classical approaches to imaging through complex media do not account for the quantum nature of the incident field. Now, images encoded on an entangled two-photon state are shown to transmit through a scattering medium whereas scattered by classical light.

A twist away from hydrogen

Tue, 19 May 2026 00:00:00 +0000

reply.relevance=9 reply.impact=8 Highest h-index author on this paper: Unknown (h-index n/a) Institution (first & last author): Pro Helvetia Electron spins are often not considered in electrocatalysis, yet they can play a pivotal role in determining reaction pathways. New research suggests that chiral (twisted) copper can generate spin-polarized charge carriers during CO2 electroreduction and suppress undesired hydrogen evolution.

More spin flow with less dissipation

Mon, 18 May 2026 00:00:00 +0000

reply.relevance=8 reply.impact=7 More spin current can be produced with less energy lost at the source, thanks to inter-magnet pumping that rebalances angular momentum dissipation between sublattices in a ferrimagnetic multilayer.

Near-optimal discrimination of displaced squeezed binary signals using displacement, inverse-squeezing, and photon-number-resolving detection

Sat, 16 May 2026 00:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: Yaping Li (h-index 24) Institution (first & last author): Unknown Near-optimal discrimination of displaced squeezed binary signals using displacement, inverse-squeezing, and photon-number-resolving detection

Generalized Toffoli gates with customizable single-step multiple-qubit control

Fri, 15 May 2026 00:00:00 +0000

reply.relevance=7 reply.impact=6 Highest h-index author on this paper: Dah-Wei Chiou (h-index 16) That author's affiliation: National Taiwan University Institution (first & last author): National Taiwan University Generalized Toffoli gates with customizable single-step multiple-qubit control

Bounding the computational power of bosonic systems

Fri, 15 May 2026 00:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: Ulysse Chabaud (h-index 12) Institution (first & last author): Unknown Bounding the computational power of bosonic systems

Controllable hydro-thermoelastic heat transport in ultrathin semiconductors at room temperature

Fri, 15 May 2026 00:00:00 +0000

reply.relevance=6 reply.impact=5 Highest h-index author on this paper: Pablo Ordejón (h-index 67) That author's affiliation: Institut Català de Nanociència i Nanotecnologia First author institution: Eindhoven University of Technology Last author institution: Institut Català de Nanociència i Nanotecnologia The combination of viscous heat flow and thermoelastic effects leads to a non-diffusive heat transport regime in MoSe2 and MoS2. Moreover, it can be controlled through the variation in sample thickness and by choosing between continuous and pulsed heating.

Spatially anisotropic Kondo resonance coupled with the superconducting gap in a kagome metal

Fri, 15 May 2026 00:00:00 +0000

reply.relevance=9 reply.impact=8 Highest h-index author on this paper: Zichen Huang (h-index 14) Institution (first & last author): Unknown How magnetic impurities influence superconductivity and electronic order in kagome metals remains unclear. Now anisotropic Kondo resonances intertwined with the superconducting gap are observed in a magnetically doped kagome superconductor.

Perfectly matched metamaterials

Thu, 14 May 2026 10:00:00 +0000

reply.relevance=9 reply.impact=8 Arbitrary control of electromagnetic waves is pivotal to the development of high-performance communications, sensing, and analog computing systems, but complex field transformations imply narrowband performance due to the resonant/frequency-dispersive nature of their realization. This work shows that metamaterials can be engineered to provide unprecedented field control over broad bandwidths of operation while remaining reflectionless. The main advantages of the proposed approach over earlier techniques, such as transformation optics, are discussed. These metamaterials provide a route toward broadband devices that perform complex functionalities, such as spatial signal preprocessing.

Overcoming the Boltzmann limit in two-dimensional memtransistors via hysteretic charge trapping

Thu, 14 May 2026 10:00:00 +0000

reply.relevance=7 reply.impact=7 Highest h-index author on this paper: Anonymous (h-index 0) Institution (first & last author): Unknown Steep-slope transistors are essential for low-power electronics, but they remain constrained by the fundamental Boltzmann limit, with most existing solutions relying on complex mechanisms that hinder scalability. The authors introduce a universal theoretical framework demonstrating that intrinsic hysteretic charge-trapping dynamics in nanoscale transistors can overcome this barrier. They also found that subthermal switching emerges from nonequilibrium feedback, providing simple and broadly applicable design principles. Future experimental validation could enable robust, scalable memtransistor technologies and drive advances in low-power and in-memory computing architectures.

Taking snapshots of spin–valley modes in a moiré superlattice

Thu, 14 May 2026 00:00:00 +0000

reply.relevance=9 reply.impact=8 An ultrafast imaging technique captured the propagation of charge-decoupled excitations in twisted bilayer WSe2. Two spin–valley modes with distinct propagation behaviours were revealed, consistent with the phase and amplitude modes of a spin–valley superfluid.

Preserved rotations in solids

Tue, 12 May 2026 00:00:00 +0000

reply.relevance=6 reply.impact=5 A seemingly still crystal is alive with synchronized atomic motions. Now, angular momentum has been observed flowing coherently between distinct lattice vibrational modes, revealing a hidden propagation of rotational features inside the crystal.

Higher-order harmonics in Josephson tunnel junctions due to series inductance

Tue, 12 May 2026 00:00:00 +0000

reply.relevance=7 reply.impact=6 Deviations from the textbook current–phase relationship of a Josephson junction can arise from the intrinsic physics of the junction, but also from the inductance of metallic traces. Now a scheme has been developed to distinguish these cases.

Laser mode braiding on a chip

Tue, 12 May 2026 00:00:00 +0000

reply.relevance=7 reply.impact=7 Highest h-index author on this paper: Wenbo Mao (h-index 0) Institution (first & last author): Unknown Non-Hermitian systems support non-trivial topological effects, yet eigenvalue braiding remains difficult to control and observe. Now, active tuning of laser modes enables programmable and directly observable braiding on an integrated photonic chip.

Observation of angular momentum transfer among crystal lattice modes

Tue, 12 May 2026 00:00:00 +0000

reply.relevance=6 reply.impact=6 Highest h-index author on this paper: J. Urban (h-index 38) Institution (first & last author): Unknown How angular momentum is exchanged and conserved among lattice modes has been difficult to measure experimentally, but has now been observed via a coherent three-phonon scattering process in a topological insulator.

Scalable generation of massive Schrödinger cat states via quantum tunnelling

Mon, 11 May 2026 00:00:00 +0000

reply.relevance=7 reply.impact=7 Highest h-index author on this paper: Yue Wang (h-index 55) That author's affiliation: Southern University of Science and Technology Institution (first & last author): Southern University of Science and Technology Massive spatial superpositions are a resource for quantum interferometry, but it has been hard to generate them beyond single atoms. Now spatially entangled massive states are realized through the tunnelling of atomic clusters in optical lattices.

Correlated insulator in the kagome flat band of a two-dimensional electrostatic crystal

Mon, 11 May 2026 00:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: O. P. Sushkov (h-index 46) That author's affiliation: UNSW Sydney First author institution: UNSW Sydney Last author institution: University of Canberra A tunable artificial crystal in a shallow GaAs quantum well is shown to enable interaction-driven insulating behaviour. Electrostatic control tunes the band structure from graphene-like to kagome-like bands.

Non-Markovianity and memory enhancement in quantum reservoir computing

Fri, 08 May 2026 00:00:00 +0000

reply.relevance=7 reply.impact=6 Highest h-index author on this paper: Roberta Zambrini (h-index 37) That author's affiliation: IFISC (UIB-CSIC) First author institution: Institute for Cross-Disciplinary Physics and Complex Systems (IFISC) UIB-CSIC, Campus Last author institution: IFISC (UIB-CSIC) Non-Markovianity and memory enhancement in quantum reservoir computing

Efficient simulation of low-entanglement bosonic Gaussian states in polynomial time

Thu, 07 May 2026 00:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: Hong-Hao Tu (h-index 26) That author's affiliation: Institute of Physics, Chinese Academy of Sciences First author institution: Institute of Physics, Chinese Academy of Sciences Last author institution: Ludwig-Maximilians-Universität München Efficient simulation of low-entanglement bosonic Gaussian states in polynomial time

Bridging chemistry and Gaussian boson sampling: a photonic hierarchy of approximations for molecular vibronic spectra

Wed, 06 May 2026 00:00:00 +0000

reply.relevance=7 reply.impact=6 Highest h-index author on this paper: Kai Luo (h-index 72) That author's affiliation: Paderborn University Institution (first & last author): Paderborn University Bridging chemistry and Gaussian boson sampling: a photonic hierarchy of approximations for molecular vibronic spectra

Multiuser entanglement distribution network across cryogenic nodes enabled by integrated photonic chips

Wed, 06 May 2026 00:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: Hao Li (h-index 0) That author's affiliation: Shanghai Research Center for Quantum Sciences First author institution: Shanghai Key Laboratory of Superconductor Integrated Circuit Technology Last author institution: Shanghai Research Center for Quantum Sciences Multiuser entanglement distribution network across cryogenic nodes enabled by integrated photonic chips

Large-scale quantum reservoir computing using a Gaussian Boson Sampler

Wed, 06 May 2026 00:00:00 +0000

reply.relevance=6 reply.impact=5 Highest h-index author on this paper: Peter L. McMahon (h-index 37) That author's affiliation: Cornell University First author institution: Sapienza Università di Roma Last author institution: Cornell University Large-scale quantum reservoir computing using a Gaussian Boson Sampler

Exploiting biased noise in variational quantum models

Tue, 05 May 2026 23:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: Sally Shrapnel (h-index 21) Institution (first & last author): Unknown Variational quantum algorithms (VQAs) have dominated literature as tools for demonstrating quantum utility on near-term quantum hardware, with applications in optimisation, quantum simulation, and machine learning. While researchers have studied how easy VQAs are to train, the effect of quantum noise on the classical optimisation process is still not well understood. Contrary to expectations, we find that twirling, which is commonly used in standard error-mitigation strategies to symmetrise noise, actually degrades performance in the variational setting, whereas preserving biased or non-unital noise can help classical optimisers find better solutions. Analytically, we study a universal quantum regression model and demonstrate that relatively uniform Pauli channels suppress gradient magnitudes and reduce expressivity, making optimisation more difficult. Conversely, asymmetric noise such as amplitude damping or biased Pauli channels introduces directional bias that can be exploited during optimisation. Numerical experiments on a variational eigensolver for the transverse-field Ising model confirm that non-unital noise yields lower-energy states compared to twirled noise. Finally, we show that coherent errors are fully mitigated by re-parameterisation. These findings challenge conventional noise-mitigation strategies and suggest that preserving noise biases may enhance VQA performance.

Quantum random access memory put to the test

Tue, 05 May 2026 00:00:00 +0000

reply.relevance=7 reply.impact=6 Highest h-index author on this paper: Connor T. Hann (h-index 13) That author's affiliation: AWS Center for Quantum Computing, Pasadena, CA, USA Institution (first & last author): AWS Center for Quantum Computing, Pasadena, CA, USA Specialized quantum memories will be required to achieve quantum speedups for data-intensive problems. Now, a proof-of-principle demonstration of such a quantum memory has been performed with a superconducting processor.

Squeezed, trisqueezed and quadsqueezed states via spin–oscillator coupling

Tue, 05 May 2026 00:00:00 +0000

reply.relevance=7 reply.impact=6 A method applied to a single trapped ion combines two linear spin-dependent interactions to generate nonlinear couplings in the ion’s motion: squeezing, trisqueezing and quadsqueezing interactions are demonstrated. The approach can be applied to any spin–oscillator system, produces stronger unitary interactions with the flexibility to switch quickly between orders, and scales seamlessly to higher orders and multiple oscillators.

Quantum-classical embedding via ghost Gutzwiller approximation for enhanced simulations of correlated electron systems

Mon, 04 May 2026 00:00:00 +0000

reply.relevance=7 reply.impact=6 Highest h-index author on this paper: Cai‐Zhuang Wang (h-index 59) That author's affiliation: Iowa State University Institution (first & last author): Iowa State University Quantum-classical embedding via ghost Gutzwiller approximation for enhanced simulations of correlated electron systems

Coherence of a hole-spin flopping-mode qubit in a circuit quantum electrodynamics environment

Fri, 01 May 2026 00:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: José C. Abadillo-Uriel (h-index 17) That author's affiliation: Instituto de Ciencia de Materiales de Madrid, Consejo Superior de Investigaciones Científicas, Madrid, Spain Institution (first & last author): University of Grenoble Alpes, CEA, Grenoble INP, IRIG-Pheliqs, Grenoble, France Coupling semiconductor qubit devices to microwave resonators provides a way to transfer quantum information over long distances. A flopping-mode qubit that combines strong coupling to photons with good coherence properties has now been demonstrated.

Squeezing, trisqueezing and quadsqueezing in a hybrid oscillator–spin system

Fri, 01 May 2026 00:00:00 +0000

reply.relevance=7 reply.impact=6 Higher-order interactions in quantum harmonic oscillator systems can result in useful effects, but they are hard to engineer. An experiment on a single trapped ion now demonstrates how spin can mediate higher-order nonlinear bosonic interactions.

Context-aware unit testing for quantum subroutines

Wed, 29 Apr 2026 23:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: Liming Zhu (h-index 45) Institution (first & last author): Unknown Software testing is a critical component of the classical software development lifecycle, and this principle is expected to hold true for quantum software as it evolves toward large-scale production and adherence to industry standards. Developing and testing quantum software presents unique challenges due to the non-deterministic nature of quantum information, the high dimensionality of the underlying Hilbert space, complex hardware noise, and the inherent non-local properties of quantum systems. In this work, we propose a unifying theoretical framework based on probabilistic assertions, which encompasses several testing approaches—such as quantum tomography and statistical tests—for developing practical unit tests for quantum subroutines. The framework is built upon the semantic equivalence between quantum subroutines and parameterized quantum channels, as established in this work. To address the computational complexity associated with unit testing in quantum systems, we propose incorporating context-awareness into the testing process. The trade-offs between accuracy, state space coverage, and efficiency associated with the proposed theoretical framework for quantum unit testing have been demonstrated through its application to a simple three-qubit quantum subroutine that prepares a Greenberger–Horne–Zeilinger state, as well as to subroutines within a program implementing Shor’s algorithm.

Multi-dimensional frequency-bin entanglement-based quantum key distribution network

Wed, 29 Apr 2026 00:00:00 +0000

reply.relevance=7 reply.impact=6 Highest h-index author on this paper: Laurent Vivien (h-index 55) That author's affiliation: Centre de Nanosciences et de Nanotechnologies First author institution: C2N, Marcoussis Last author institution: Centre de Nanosciences et de Nanotechnologies Multi-dimensional frequency-bin entanglement-based quantum key distribution network

Optical interferometric readout of a magnetically levitated superconducting microsphere

Tue, 28 Apr 2026 10:00:00 +0000

reply.relevance=6 reply.impact=5 Highest h-index author on this paper: Anonymous (h-index 1) That author's affiliation: University of Vienna First author institution: University of Vienna Last author institution: Austrian Academy of Sciences We probe the motion of a 6-$\text{μ}\mathrm{g}$ magnetically levitated superconducting microsphere using optical interferometry at $3\phantom{\rule{0.1em}{0ex}}\mathrm{K}$, achieving a resolution of the order of $1\phantom{\rule{0.1em}{0ex}}\mathrm{nm}/\sqrt{\mathrm{Hz}}$, and use the measured signa…

Scaffold-assisted window junctions for superconducting qubit fabrication

Tue, 28 Apr 2026 00:00:00 +0000

reply.relevance=7 reply.impact=6 Highest h-index author on this paper: John M. Martinis (h-index 106) That author's affiliation: University of California, Santa Barbara First author institution: Institute of Physics, Academia Sinica Last author institution: Research Center for Applied Science, Academia Sinica Scaffold-assisted window junctions for superconducting qubit fabrication

Bell state measurements in quantum optics: a review of recent progress and open challenges

Mon, 27 Apr 2026 23:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: Davide Bacco (h-index 25) That author's affiliation: Istituto Nazionale di Fisica Nucleare, Sezione di Firenze Institution (first & last author): Istituto Nazionale di Fisica Nucleare, Sezione di Firenze Bell state measurements, which project bipartite states onto the maximally entangled Bell basis, are central to a wide range of quantum information processing tasks, including quantum teleportation, entanglement swapping, and fusion-gate quantum computation. In photonic platforms, where information is encoded in optical degrees of freedom, the realization of efficient Bell state measurements is particularly challenging, especially when constrained to linear optical elements. In this review, we provide a comprehensive examination of existing proposals for the implementation of Bell state measurements, highlighting their fundamental limitations and the strategies developed to overcome them. Moreover, we survey recent advances and discuss open challenges, with a particular focus on Bell state measurements for high-dimensional systems, an area of growing interest due to its relevance for quantum repeaters and scalable quantum networks.

Refined criteria for quantum random-access memory error suppression via an efficient large-scale simulator

Fri, 24 Apr 2026 10:00:00 +0000

reply.relevance=7 reply.impact=6 Highest h-index author on this paper: Anonymous (h-index 0) Institution (first & last author): Unknown Quantum random-access memory (QRAM) is a critical primitive for quantum algorithms that require data lookup in superposition, but its lack of fault tolerance poses a major obstacle to practical deployment. Error filtration (EF) has been proposed as a hardware-efficient alternative to error correctio…

Measuring reactive-load impedance with transmission-line resonators beyond the perturbative limit

Fri, 24 Apr 2026 10:00:00 +0000

reply.relevance=7 reply.impact=6 Highest h-index author on this paper: James Hone (h-index 30) That author's affiliation: Columbia University Institution (first & last author): Columbia University We develop an analytic framework to extract circuit parameters and loss tangent from superconducting transmission-line resonators terminated by reactive loads, extending analysis beyond the perturbative regime. The formulation yields closed-form relations between resonant frequency, participation ra…

Scalable fluxonium-qubit architecture with tunable interactions between noncomputational levels

Fri, 24 Apr 2026 10:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: Unknown (h-index 0) First author institution: University of Science and Technology of China Last author institution: Unknown The fluxonium qubit has emerged as a promising candidate for superconducting quantum computing due to its long coherence times and high-fidelity gates. Nonetheless, further scaling up and improving performance remain critical challenges for establishing fluxoniums as a viable alternative to transmon…

Flux-trapping characterization for superconducting electronics using a cryogenic widefield N-V diamond microscope

Fri, 24 Apr 2026 10:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: Jennifer M. Schloss (h-index 0) Institution (first & last author): Unknown Magnetic flux trapping is a significant hurdle limiting the reliability and scalability of superconducting electronics, yet tools for imaging flux vortices remain slow or insensitive. We present a cryogenic widefield N-V diamond magnetic microscope capable of rapid, micrometer-scale imaging of flux …

Near-term fermionic simulation with subspace noise tailored quantum error mitigation

Fri, 24 Apr 2026 00:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: Miha Papič (h-index 21) That author's affiliation: IQM Quantum Computers, Ludwig-Maximilians-Universität München First author institution: IQM (Germany) Last author institution: University of Würzburg Near-term fermionic simulation with subspace noise tailored quantum error mitigation

Enhancing quantum clocks and sensors with randomization and decoherence

Thu, 23 Apr 2026 23:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: Luis Pedro García-Pintos (h-index 16) That author's affiliation: Los Alamos National Laboratory Institution (first & last author): Los Alamos National Laboratory This letter shows how incoherent dynamics can lead to metrological advantages in quantum sensing. The results rely on the fact that incoherent dynamics lead to an additive contribution to the quantum Fisher information about time. Such an additive contribution can reduce the error of optimal estimation protocols, as implied by the quantum Cramér–Rao bound. I characterize regimes in which the estimation of a time interval or a frequency is enhanced by decoherence, thereby identifying cases in which incoherent dynamics serve as a metrological resource. The decoherence processes that yield enhanced precision of quantum sensors can be engineered by randomized Hamiltonian dynamics. I illustrate the results with protocols that display improved sensing of time intervals or global fields by qubit and photonic sensors. Enhanced precision of time intervals is achieved with Hamiltonians that include randomized global parameters. Enhanced precision in field estimation is obtained by randomized sensing times.

Entanglement percolation in random quantum networks

Thu, 23 Apr 2026 23:00:00 +0000

reply.relevance=6 reply.impact=5 Highest h-index author on this paper: Anna Sanpera (h-index 46) That author's affiliation: ICREA & Universitat Autònoma Barcelona First author institution: Università degli Studi di Palermo Last author institution: ICREA & Universitat Autònoma Barcelona Entanglement percolation aims at generating maximal entanglement between any two nodes of a quantum network (QN) by utilizing strategies based solely on local operations and classical communication between the nodes. As it happens in classical percolation theory, the topology of the network is crucial, but also the entanglement shared between the nodes of the network. In a network of identically partially entangled states, the network topology determines the minimum entanglement needed for percolation. In this work, we generalize the protocol to scenarios where the initial entanglement shared between any two nodes of the network is not the same but has some randomness. In such cases, we find that for classical entanglement percolation, only the average initial entanglement is relevant. In contrast, the quantum entanglement percolation protocol (within the q-swap framework) degrades under these more realistic conditions as the width of the distribution increases, suggesting that random classical entanglement percolation may become the optimal LOCC strategy in sufficiently heterogeneous QNs.

Planckian scattering and parallel conduction channels in an iron chalcogenide superconductor

Thu, 23 Apr 2026 00:00:00 +0000

reply.relevance=7 reply.impact=6 Highest h-index author on this paper: Hee Taek Yi (h-index 29) That author's affiliation: Rutgers, The State University of New Jersey Institution (first & last author): Johns Hopkins University The link between the strange metal with its linear-in-temperature resistivity and superconductivity is ambiguous. Now, a channel in the normal state whose scattering rate is linear in temperature is shown to drive superconductivity in FeTe1−xSex.

Surface-code hardware Hamiltonian

Wed, 22 Apr 2026 00:00:00 +0000

reply.relevance=9 reply.impact=8 Highest h-index author on this paper: Mohammad H. Ansari (h-index 11) Institution (first & last author): Unknown Surface-code hardware Hamiltonian

Distributed quantum inner product estimation with structured random circuits

Tue, 21 Apr 2026 00:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: Zaichen Zhang (h-index 38) Institution (first & last author): Unknown Distributed quantum inner product estimation with structured random circuits

Two-qubit gates using on-demand single-photons from ordered shape and size controlled large-volume superradiant quantum dots

Tue, 21 Apr 2026 00:00:00 +0000

reply.relevance=7 reply.impact=7 Highest h-index author on this paper: A. Madhukar (h-index 55) Institution (first & last author): Unknown Two-qubit gates using on-demand single-photons from ordered shape and size controlled large-volume superradiant quantum dots

Two-electron quantum walks for probing entanglement and decoherence in an electron microscope

Tue, 21 Apr 2026 00:00:00 +0000

reply.relevance=7 reply.impact=6 Highest h-index author on this paper: Ido Kaminer (h-index 56) That author's affiliation: Technion – Israel Institute of Technology First author institution: Technion – Israel Institute of Technology Last author institution: University of Konstanz Entanglement between particles offers insights into quantum behaviour, but methods for studying it in free-electron systems are lacking. Now a two-electron quantum walk is used to probe decoherence of free electrons inside an electron microscope.

Average topological phase in a disordered Rydberg atom array

Mon, 20 Apr 2026 00:00:00 +0000

reply.relevance=7 reply.impact=6 In addition to strongly protected topological phases that rely on exact symmetries, theory predicts that disorder can stabilize weakly protected phases in mixed quantum states, and an example of the latter is now observed in a Rydberg atom array.

Collective purification of interacting quantum networks beyond symmetry constraints

Fri, 17 Apr 2026 00:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: Durga Bhaktavatsala Rao Dasari (h-index 15) Institution (first & last author): Weizmann Institute of Science Collective purification of interacting quantum networks beyond symmetry constraints

Quantum reservoir computing induced by controllable damping

Fri, 17 Apr 2026 00:00:00 +0000

reply.relevance=7 reply.impact=6 Highest h-index author on this paper: Fabio Monzani (h-index 55) First author institution: Dipartimento di Fisica “Aldo Pontremoli” Last author institution: Università degli Studi di Milano Quantum reservoir computing induced by controllable damping

Time-series forecasting with multiphoton quantum states and integrated photonics

Fri, 17 Apr 2026 00:00:00 +0000

reply.relevance=6 reply.impact=5 Highest h-index author on this paper: Roberto Osellame (h-index 70) First author institution: Sapienza Università di Roma Last author institution: Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche (IFN-CNR) Time-series forecasting with multiphoton quantum states and integrated photonics

Beyond boson sampling: higher spin sampling as a practical path to quantum supremacy

Fri, 17 Apr 2026 00:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: En-Jui Kuo (h-index 9) First author institution: Quantum Theory Group, Dipartimento di Fisica e Chimica Emilio Segrè, Università degli Studi di Palermo, Palermo, Italy Last author institution: Department of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu, Taiwan, Republic of China Beyond boson sampling: higher spin sampling as a practical path to quantum supremacy

Frozen sound

Thu, 16 Apr 2026 00:00:00 +0000

reply.relevance=7 reply.impact=6 Highest h-index author on this paper: Vincent Pagneux (h-index 42) Institution (first & last author): Centre National de la Recherche Scientifique Frozen sound

Publisher Correction: Fiber-coupled broadband quantum memory for polarization-encoded photonic qubits

Wed, 15 Apr 2026 00:00:00 +0000

reply.relevance=7 reply.impact=5 Publisher Correction: Fiber-coupled broadband quantum memory for polarization-encoded photonic qubits

Lower-bounding entanglement in a general Bell scenario

Wed, 15 Apr 2026 00:00:00 +0000

reply.relevance=7 reply.impact=6 Highest h-index author on this paper: Zhen‐Peng Xu (h-index 15) Institution (first & last author): University of Science and Technology of China Lower-bounding entanglement in a general Bell scenario

Efficient thermalization and universal quantum computing with quantum Gibbs samplers

Wed, 15 Apr 2026 00:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: Cambyse Rouzé (h-index 15) First author institution: Institut national de recherche en sciences et technologies du numérique Last author institution: Consejo Superior de Investigaciones Científicas Quantum simulation of equilibrium many-body systems requires the ability to sample from the thermal distribution of quantum states. An algorithm has now been proven to be an appropriate quantum analogue to classical Monte Carlo methods.

Intrinsic phononic dressed states in a nanomechanical system

Tue, 14 Apr 2026 00:00:00 +0000

reply.relevance=6 reply.impact=5 Highest h-index author on this paper: M. L. Roukes (h-index 78) Institution (first & last author): Unknown Exploiting the differences between quantum and classical physics typically requires nonlinear devices. Quantum nonlinear effects have now been demonstrated in a nanomechanical resonator due to strong coupling with an intrinsic two-level defect.

Photoengineering the magnon spectrum in an insulating antiferromagnet

Tue, 14 Apr 2026 00:00:00 +0000

reply.relevance=6 reply.impact=5 Controlling the dynamics of magnons at terahertz frequencies is important for fast and efficient information processing devices. Now optical excitation is shown to enable ultrafast manipulation of magnon spectra in an insulating antiferromagnet.

Non-Gaussian quantum state engineering with postselected von Neumann measurements

Mon, 13 Apr 2026 23:00:00 +0000

reply.relevance=8 reply.impact=7 Highest h-index author on this paper: Xiaoxi Yao (h-index 0) Institution (first & last author): Liaoning University The practical value of non-Gaussian states for quantum computation, metrology, and networking is currently limited by the intrinsically low success rates of conventional generation methods like photon addition and subtraction. We introduce a scalable protocol that overcomes this bottleneck using postselected von Neumann measurements beyond the weak-coupling regime. Applied to standard Gaussian inputs, our method efficiently generates a suite of critical resources—including large-amplitude Schrödinger cat states, Gottesman–Kitaev–Preskill-like states, and two-mode entangled states—with considerably higher success probabilities. Quantitative analysis of Wigner negativity and entanglement confirms their high quality. This work establishes postselected von Neumann measurement as a general and scalable principle for quantum resource generation, moving beyond a fundamental limitation in quantum state engineering.

Entanglement-Assisted Multiparameter Estimation with a Solid-State Quantum Sensor