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Epitaxial quantum dots in group III-V semiconductors are promising candidates for qubits and quantum memories, but nuclear spin coherence has been limited to 1 ms range. Here the authors achieve coherence times exceeding 100 ms in GaAs quantum dots using strain engineering and dynamical decoupling.

Laser-induced conversion electron Mössbauer spectroscopy, which detects electrons emitted by ²²⁹Th nuclei in a thin ThO₂ sample excited by vacuum ultraviolet light, is demonstrated, opening the possibility of a conversion-electron-based nuclear clock.

Noise and decoherence are serious problems for scalable quantum computing schemes. Using an all-optical approach, Bell et al.explore the use of four-qubit graph states for encoding quantum information, and show that they can reliably detect and correct errors against loss.

A quantum simulator can follow the evolution of a prescribed model, whose behaviour may be difficult to determine. Here, the emergence of magnetism is simulated by implementing a quantum Ising model, providing a benchmark for simulations in larger systems.

A purpose-built implantable system based on biomimetic epidural electrical stimulation of the spinal cord reduces the severity of hypotensive complications in people with spinal cord injury and improves quality of life.

The monolayer transition-metal dichalcogenide molybdenum disulphide has recently attracted attention owing to its distinctive electronic properties. Cao and co-workers present numerical evidence suggesting that circularly polarized light can preferentially excite a single valley in the band structure of this system.

Isolated many-body quantum systems do not thermalize with an external environment but in most cases the internal dynamics leads to the emergence of an effective thermal equilibrium for local degrees of freedom. Here the authors study this behaviour with a realization of a long-range spin model.

The authors achieve nonvolatile manipulation of atomically thin topological polar textures in twisted boron nitride, enabling a tunable platform for exploring topological phenomena and high-density nanoelectronic devices.

Here authors show that dangling-bond-induced surface states are critical in governing Fermi level pinning at the metal-semiconductor interfaces. The reconstruction-induced self-passivation of dangling bonds leads to Si having a weaker pinning than Ge, which prefers non-reconstruction.

Strong lasing effects similar to those in the optical regime can occur at 1.5–2.1 Å wavelengths during high-intensity XFEL-driven Kα₁ lasing of copper and manganese.

Quantum error correction of Gottesman–Kitaev–Preskill code states is realized experimentally in a superconducting quantum device.

A simply prepared quantum bit that is a hybrid of spin and charge enables full control on the Bloch sphere with π-rotation times of less than 100 picoseconds in two orthogonal directions; the speed arises from the charge-like characteristics, and the spin-like features result in increased quantum coherence.

Magnetic skyrmions are thought to possess a tube-like structure in three dimensions, but this has not been directly observed in experiment. Here, Birch et al. report real-space imaging of skyrmion tubes in a lamella of FeGe.

Chiral emission from collective guided modes is demonstrated within a photonic crystal slab, showing an example of collective oscillations in the momentum space.

Here the authors provide a theoretical description of non-Hermitian topological phenomena in an atomic mirror. They find out diverse and unexpected phenomena by constructing an ad-hoc theoretical model. In particular, exceptional points, dispersive bulk Fermi arcs, and non-Hermitian geometry-dependent skin effect.

Strong anisotropy of the electronic Bloch functions observed in CdSe nanoplatelets enables efficient directional emission.

Lightwave electronics could enable the control of interactions in quantum materials and provide access to the quantum phases and quantum information of condensed-matter systems. This Review discusses the fundamental concepts of lightwave electronics and outlines key advances and potential applications.

Probing quantum many-body systems while undergoing thermalisation is challenging, especially when looking for signatures of ergodicity and quantum chaos. Here, the authors study a lattice gauge theory in 2+1 dimensions using a trapped-ion-based universal digital quantum computer, unveiling the role of entanglement in the thermalization dynamics.

The standard band structure picture cannot be applied to amorphous materials as they lack crystal symmetry. Now a first-principles approach that captures the possibility of band-like electron transport in amorphous solids is presented, with In₂O₃ as an example.

Coherent Rabi flopping and coherent pulse reshaping are directly observed in an operating quantum cascade laser. The findings indicate the potential for coherent effects to be exploited in mode locking, and may stimulate new approaches for generating short pulses in quantum cascade lasers.

The strong connection between the dynamics of a physical system and its Hamiltonian’s spectrum has scarcely been applied in the non-Hermitian case. Here, the authors use a photonic quantum walk to confirm and expand previous theoretical analyses connecting self-acceleration dynamics with non-trivial point-gap topology.

TransBrain translates brain phenotypes between mouse and human via homology mapping, thus making it possible to capitalize on the wealth of knowledge about the mouse brain and gain insights into the human brain.

Hybrid quantum technologies synergistically combine different types of systems with complementary strengths. Here, the authors show monolithic integration and control of quantum dots and the emitted single photons in a surface acoustic wave-driven GaAs integrated quantum photonic circuit.

Polar skyrmions are particle-like objects consisted of swirling electric dipoles that hold promise for next generation nanodevices. Here, the authors explore the strain-induced transition from skyrmions to merons using electron imaging methods.

Impurity spins in silicon can be controlled with microwaves and then read-out electrically, offering a promising platform for quantum information applications. Here, the authors show that terahertz pulses can be used to address the orbital degree of freedom as well, which can also be detected electrically.

Skyrmions are topologically non-trivial, vortex-like magnetic structures the dynamics of which have been mostly studied in 2D systems, but they are also able to exist as 3D tube-like structures. Here, the authors report a combination of experimental and computational results investigating the annihilation dynamics of 3D skyrmion structures in order to better understand how to stabilise topological structures in other bulk magnetic systems.

A three-partite cluster state made of one semiconductor spin and two indistinguishable photons is generated from an InGaAs quantum dot embedded in a pillar microcavity. The three-partite entanglement rate is 0.53 MHz at the output of the device.

High-frequency rectifiers at terahertz regime are pivotal components in modern communication, whereas the drawbacks in semiconductor junctions-based devices inhibit their usages. Here, the authors report electromagnetic rectification with high signal-to-noise ratio driven by chiral Bloch-electrons in type-II Dirac semimetal NiTe₂-based device allowing for efficient THz detection.

Topological effects can be emulated using photonic lattices where the length of a waveguide represents time, which is often limited by fabrication constraints. Here, Mukherjee et al. exploit a single-photon detector array enabled state-recycling scheme to increase the accessible time scale.

The authors study the formation and characteristics of a Majorana metallic quantum spin liquid state in Kitaev’s honeycomb model under a moderate external magnetic field. This state represents a novel class of gapless quantum spin liquids stabilized by magnetic field.

The dynamical phases of out-of-equilibrium Bardeen–Cooper–Schrieffer superconductors have been simulated using cold atoms levitated inside an optical cavity.

Transmission X-ray microscopy allows for the imaging of magnetic domains in thin film materials. Here, the authors exploit the angular dependence of the magnetic contrast to extract out-of-plane canting angles of stripe domains and topological defects in NdCo₅films buried under a NiFe layer.

Demonstrating the advantage of collective measurements in experiments remains a daunting task. Here the authors introduce a general recipe for performing deterministic collective measurements on two identically prepared qubits based on quantum walks.

Coherent control of two flexural modes of a nanoscale oscillator using radiofrequency signals is now demonstrated. This oscillator is analogous to quantum two-level systems such as superconducting circuits and quantum dots, and therefore this technique raises the possibility of information processing using nanomechanical resonators.

Polar skyrmions are nanoscale topological structures of electric polarizations. Their collective modes, dubbed as “skyrons”, are discovered by the terahertz-field-excitation, femtosecond x-ray diffraction measurements and advanced modeling.

Quantum dots are a promising host for spin-based qubits. Whereas nuclear-field fluctuations adversely affect electron-spin coherence, the smaller hyperfine interaction between holes and nuclei makes holes a promising alternative. A sensitive measurement of the hyperfine constant of the holes in different quantum-dot material systems now demonstrates how this interaction can be tuned and perhaps further reduced.

Achieving versatile, tunable, real-time topological photonic system is challenging. Now this is accomplished by designing superlattices of WS₂ and a polymer embedded in a microcavity.

Domain wall motion driven by ultra-short laser pulses has potential for storage of information in magnetoelectronic devices. Here the authors demonstrate the conversion of a circularly polarized femtosecond laser light into inertial displacement of a domain wall in a ferromagnetic semiconductor.

A qubit generated and stabilized in a superconducting microwave resonator by encoding it into Schrödinger cat states produced by Kerr nonlinearity and single-mode squeezing shows intrinsic robustness to phase-flip errors.

Disordered metasurfaces can manipulate light in complex ways. Here, the authors reveal a critical packing regime where metaatoms begin to connect, causing abrupt changes in scattered light and colour.

Identifying jets originating from heavy quarks plays a fundamental role in hadronic collider experiments. In this work, the ATLAS Collaboration describes and tests a transformer-based neural network architecture for jet flavour tagging based on low-level input and physics-inspired constraints.

3D higher-order topological insulators (HOTIs) exhibit 1D hinge states depending on extrinsic sample details, while intrinsic features of HOTIs remain unknown. Here, K.S. Lin et al. introduce the framework of spin-resolved topology to show that helical HOTIs can realize a doubled axion insulator phase with nontrivial partial axion angles.

Full control by electric gates can be accomplished in exchange-driven spin qubits.

Spin waves are promising candidates as carriers for energy-efficient information processing, but they have not yet been fully explored application wise. Here the authors theoretically demonstrate that antiferromagnetic domain walls are naturally spin wave polarizers and retarders, two key components of magnonic devices.

The defining quantities of topological materials—the topological invariants—are often difficult to calculate. Here, Song et al. report a simplified method to calculate both the symmetry data and the topological invariants for arbitrary gapped band structure with time-reversal symmetry.

Control of quantum interference in engineered atomic-scale systems could enable precise manipulation of quantum states, however it has remained challenging. Here the authors demonstrate electrically tunable quantum interference in a system of Ti atoms on MgO surface, using a scanning probe microscope setup.