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Experimental measurements of high-order out-of-time-order correlators on a superconducting quantum processor show that these correlators remain highly sensitive to the quantum many-body dynamics in quantum computers at long timescales.

Cosmic rays flying through superconducting quantum devices create bursts of excitations that destroy qubit coherence. Rapid, spatially resolved measurements of qubit error rates make it possible to observe the evolution of the bursts across a chip.

A materials platform using tantalum as a base layer and silicon as the substrate to construct superconducting qubits enables device performance improvements such as millisecond lifetimes and coherence times, as well as high time-averaged quality factors.

The mathematical conditions for the best thermoelectric is well known but never realised in real materials. Here, the authors propose the Anderson transition in a narrow impurity band as a physical realisation of this seemingly unrealisable scenario.

Metamaterials enable the control and manipulation of light on subwavelength scales, allowing numerous optical device applications. Here, the authors show the selective excitation of spatially confined modes in an anisotropic hyperbolic metamaterial, based on the photonic spin Hall effect.

Two below-threshold surface code memories on superconducting processors markedly reduce logical error rates, achieving high efficiency and real-time decoding, indicating potential for practical large-scale fault-tolerant quantum algorithms.

A study establishes a scalable approach to engineer and characterize a many-body-localized discrete time crystal phase on a superconducting quantum processor.

It is hoped that quantum computers may be faster than classical ones at solving optimization problems. Here the authors implement a quantum optimization algorithm over 23 qubits but find more limited performance when an optimization problem structure does not match the underlying hardware.

The two frequency-modulated superconducting qubits act as a trembling mirror for microwave photons with on-demand tunable directionality.

A study demonstrating increasing error suppression with larger surface code logical qubits, implemented on a superconducting quantum processor.

CrSBr is a van der Waals layered antiferromagnet. Unlike many other van der Waals magnetic materials it is air stable, and in addition hosts a rich array of magneto-optical responses. Here, Tabataba-Vakili et al demonstrate that the magnetic and optical response of CrSBr is sensitive to gating, allowing electrical control of the magneto-optical properties.

Understanding localization and delocalization phenomena is important for studying wave propagation in many types of disordered photonic systems. Here, a theoretical study of one-dimensional photonic crystal structures reveals the importance of Fano interference in wave transport in the presence of disorder.

Nonmagnetic colloidal nanocrystals demonstrate magnetic properties due to spins of dangling bonds at their surface resulting in formation of dangling-bond magnetic polarons.

Cavity-enhanced light-matter interaction in the weak-coupling regime is known to result in Purcell enhancement. Here the authors demonstrate Purcell enhancement in the photoluminescence of vertical MoSe₂-WSe₂ heterostructures coupled to a micro-cavity and determine the light-matter coupling strength for interlayer excitons.

Understanding the distribution of energy between electric and magnetic channels of a metamaterial remains elusive. Decker et al.study the emission of quantum dots into these channels for a split-ring-resonator metamaterial and differentiate the fundamental behaviour of the two modes.

Zigzag arrays of silicon nanoparticles show topologically protected third-harmonic generation at the nanoscale.

High-performance MoS₂ transistors can be created using 2-nm-thick CaF₂ as a gate insulator, which forms a quasi van der Waals interface with the 2D semiconductor.

A higher-order topological phase is demonstrated, manifesting as robust, topologically protected corner modes in a silicon photonics system.

Repetition codes running many cycles of quantum error correction achieve exponential suppression of errors with increasing numbers of qubits.

Anderson localization, a strong localization effect that prevents wave diffusion, is fundamentally important in manipulating wave propagation in a disordered medium. This work uses a phase separated glass Anderson localization optical fiber and demonstrates quantum light transport, which shows the potential for transmission of high dimensional quantum information, thereby enabling quantum imaging and quantum communication applications.

Semiconductor nanostructures are central to the implementation of quantum communication and information technologies. The authors leveraged spin degrees of freedom in quantum dot ensembles to increase optical coherence timescales, thereby disclosing intriguing solutions for future quantum memories.

The importance of the Fano resonance concept is recognized across multiple fields of physics. In this Review, Fano resonance is explored in the context of optics, with particular emphasis on dielectric nanostructures and metasurfaces.

This Progress Article examines the characteristic features of low-frequency electronic noise in graphene, and discusses the implications and potential applications of such noise in graphene-based electronic devices.

Hyperbolic, or indefinite, metamaterials are reviewed. These anisotropic materials may exhibit properties such as strong enhancement of spontaneous emission, diverging density of states, negative refraction and superlensing.

Ideal qubits should exhibit, simultaneously, long spin coherence times and fast initialization. Here, defect centers in ZnSe epilayers, introduced by ex-situ fluorine implantation, are displaying spin coherence times of 100 ns at room temperature and fast optical access on the picosecond timescale.

Ultrafast optical manipulation of excitons in semiconductor nanostructures offers practical access to quantum phenomena in condensed matter. The authors demonstrate a new scheme to control the exciton dephasing in large ensembles of quantum dots by application of resonant optical pulses that enable promising routes in the quest for quantum memories for information and communication technologies.