Nanotechnology

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

Reversible solid oxide cells can be limited by the kinetics of the reactions occurring at the oxygen electrode. Here the authors show that compositing a Gd0.3Ca2.7Co3.82Cu0.18O9−δ catalyst with a balanced oxygen-ion- and hole-conducting BaCe1−xZrxO3-based material leads to enhancements in performance.

That author's affiliation: Massachusetts Institute of Technology Institution (first & last author): Massachusetts Institute of Technology

Electrochemically mediated CO2 capture typically makes use of sorbents that must be reduced before binding CO2, a process often hampered by competitive oxygen reduction reactions. Here the authors develop N-heterocyclic imines that capture CO2 in the neutral state and release it with near-theoretical Faradaic efficiency upon electro-oxidation, avoiding the competing reaction.

That author's affiliation: Instituto de Ciencia de Materiales de Madrid Institution (first & last author): University of Grenoble Alpes

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.

That author's affiliation: University of Oxford Institution (first & last author): University of Oxford

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.

That author's affiliation: Centre de Nanosciences et de Nanotechnologies First author institution: Centre de Nanosciences et de Nanotechnologie, CNRS, Université Paris Saclay, Palaiseau, France Last author institution: Centre de Nanosciences et de Nanotechnologies

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

That author's affiliation: University of Michigan First author institution: University of Michigan Last author institution: Texas Tech University

Tuning symmetry breaking in magnetic transitions via twist-angle engineering is challenging, as twisted two-dimensional magnets often inherit the magnetic ground states of their constituent parts. Now this tunability is achieved in a double-bilayer moiré magnet.

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

That author's affiliation: IQM Quantum Computers, Munich, Germany First author institution: IQM (Germany) Last author institution: University of Würzburg

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

That author's affiliation: SANKEN (The Institute of Scientific and Industrial Research), The University of Osaka, Osaka, Japan First author institution: Department of Chemistry, Southern University of Science and Technology, Shenzhen, China Last author institution: School of Physics and Electronics, Hunan University, Changsha, China

Understanding dynamic heterogeneity in hydrogen evolution electrocatalysts is essential but difficult with limited spatio-temporal resolution. Here the authors use interferometric electro-optical microscopy to achieve nanometre–millisecond imaging of hydrogen evolution activity on MoS2.

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.

That author's affiliation: California Institute of Technology Institution (first & last author): California Institute of Technology

Magnetic fields usually weaken superconductivity. By contrast, a material platform is demonstrated where applying a moderate field induces superconductivity.

We study excited states and finite temperature properties of chains of randomly placed spins with long range interactions. To this end we extend the recently introduced strong disorder renormalization group method in real space, well suited to study bond disordered antiferromagnetic power law couple…

That author's affiliation: Joint Institute for Nuclear Research, Dubna First author institution: Port Said University Last author institution: Joint Institute for Nuclear Research, Dubna

We demonstrate the realization and interplay of two ferromagnetic resonances in one SFS ${φ}_{0}$ Josephson junction. The first resonance, which is realized under microwave radiation, is the famous Kittel resonance. The other is the Buzdin one, appearing as a result of the interaction of a supercond…

Recently, electrides have received great attention because of their unique electronic, structural, and electron-phonon coupling behaviors, which are mainly attributed to the localizations of nonbound electrons at crystalline interstitial regions. Here, we propose several stable exotic Li-In compound…

That author's affiliation: IISER Bhopal Institution (first & last author): IISER Bhopal

We examine excitation suppression in the transverse-field Ising model (TFIM), where finite-time drive across a quantum critical point is assisted by the presence of a time-dependent coupling parameter. While conventional counterdiabatic protocols are designed to eliminate excitations, they often req…

That author's affiliation: Tufts University Institution (first & last author): Tufts University

We propose and analyze an all-mechanical route to coherent control and quantum-state reconstruction of the fundamental flexural mode of a suspended carbon nanotube (CNT) operated in the anharmonic (Duffing/Kerr) regime. A nearby atomic force microscope (AFM) tip provides a single, localized actuator…

That author's affiliation: Jiangsu Normal University First author institution: Unknown Last author institution: Jiangsu Normal University

A flat band is a significant platform for investigating a series of novel quantum phase in the condensed matter physics. However, its realization highlights the fundamental challenge and it has only been discovered in a small number of systems. In this work, we propose a bend-sliding atomic model to…

We investigate Floquet-engineered topological phases in two-dimensional ${d}_{{x}^{2}−{y}^{2}}$-wave altermagnets irradiated by circularly polarized light in the off-resonant regime. These materials exhibit large momentum-dependent spin splitting governed by distinctive magnetic symmetries. Using a …

The impacts of the mass imbalance and Coulomb interaction on the complex phase structures of the polaritonic condensates and their Bardeen-Cooper-Schrieffer (BCS)–Bose-Einstein condensation (BEC) crossover in semiconductor and semimetal microcavities are investigated. In the framework of the unrestr…

That author's affiliation: University of Regensburg First author institution: National University of Singapore Last author institution: University of Regensburg

The Edelstein effect, which enables charge-to-spin conversion and is therefore highly promising for future spintronic devices, can be realized and nonvolatilely manipulated in ferroelectric materials owing to their broken inversion symmetry and switchable polarization states. To date, most ferroelec…

That author's affiliation: Southeast University Institution (first & last author): Southeast University

Distributed quantum inner product estimation with structured random circuits

That author's affiliation: University of Southern California Institution (first & last author): University of Southern California

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

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.

That author's affiliation: Tsinghua University Institution (first & last author): Tsinghua University

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.

That author's affiliation: The University of Tokyo First author institution: The University of Tokyo Last author institution: Hokkaido University

Optical forces and torques on nanoparticles are difficult to measure due to the diffraction limit of light. Now, transverse optical torque is observed through the optical trapping and spatial tracking of a designed microscale structure.