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No noncontextual hidden-variable model can be consistent with quantum theory, but proving such an inconsistency with nature itself is a long-standing problem. Here, the authors devise experimentally-achievable tests of noncontextuality and perform a photonic implementation that rules out such models.

Van der Waals heterostructures have been so far mostly assembled by artificial stacking of individual 2D layers with diverse functionalities. Here, the authors shift the focus demonstrating the exfoliation of a naturally occurring franckeite heterostructure, a p-type narrow band-gap semiconductor.

Nuclear spins in gallium arsenide produce noise at discrete frequencies, which can be notch-filtered efficiently to extend coherence times of electron spin qubits to nearly 1 ms.

Trilayer graphene was recently shown to exhibit superconductivity without a Moire pattern that had proved important in tuning superconductivity in bilayer graphene. Here, the authors explore correlated metallic phases and the pairing mechanism of superconductivity in trilayer graphene, and show that intervalley coherent fluctuations can act as a pairing glue, giving rise to chiral unconventional superconductivity.

In a hybrid superconductor–ferromagnet device, the dynamic stray fields of current-driven vortices unidirectionally excite coherent short-wavelength magnons.

Surface structures can have an important effect on the traits of two-dimensional electron liquids. Here, the authors demonstrate how the surface terminations of SrTiO₃(001) affect the mechanism and properties of the two-dimensional electron liquid.

Scanning tunnelling microscopy is used to image pristine electrostatically defined quantum Hall edge states in graphene with high spatial resolution and demonstrate their interaction-driven restructuring.

Three-dimensional topological insulators have become a research focal point on topological quantum matter. Here, the authors propose the non-Hermitian analogue, the exceptional topological insulator, with anomalous surface states only existing within the topological bulk embedding.

A scanning tunnelling microscopy technique that minimally perturbs the sample quantifies the interacting phase diagram of the zeroth Landau level in monolayer graphene.

Arrays of superconducting transmon qubits can be used to study the Bose–Hubbard model. Synthetic electromagnetic fields have now been added to this analogue quantum simulation platform.

Creating and controlling topological states of matter has become a central goal in condensed matter physics. Here, the authors report a predictive Floquet engineering of various topological phases in Na₃Bi by using femtosecond laser pulses.

Direct observation of light-induced topological Floquet states can be challenging due to a number of obstacles such as laser-assisted photoemission which can complicate photoemission spectra. Here, the authors report a theoretical approach to the identification of topological Floquet states using circular dichroism in angle resolved photoemission spectroscopy.

The hybrid behavior of strongly interacting light and matter in cavities can be engineered by tailoring the cavity parameters, but simulating such systems is hard due to the complexity of the matter and quantum light. In this work, the authors derive an effective ab-initio theory reducing the light description to a single degree of freedom while ensuring finite light-matter coupling even in macroscopic systems.

A new generation of increasingly powerful magnets is dramatically extending the resolution, speed and analytical capabilities of magnetic resonance imaging for brain research.

Control engineering techniques are promising for realizing stable quantum systems to counter their extreme fragility. Here the authors use techniques from machine learning to enable real-time feedback suppression of decoherence in a trapped ion qubit by predicting its future stochastic evolution.

Vector magnetometers measure magnetic fields for diverse applications. Here, the authors present a high-resolution vector atomic magnetometer achieving precise field and angular measurements, addressing key metrology challenges while retaining the accuracy and calibration benefits of scalar sensors.

An integrated structural biology approach combining NMR, cryo-EM, X-ray crystallography and molecular dynamics simulations is implemented to characterise the conformational dynamics and interactions of the eukaryotic RNA exosome complex.

High-harmonic waves are generated from a MgO crystal under experimental conditions where the simple semi-classical analysis fails. High-harmonic generation spectroscopy directly probes the strong-field attosecond dynamics over multiple bands.

Time-resolved X-ray scattering is utilized to demonstrate an ultrafast 300 ps topological phase transition to a skyrmionic phase. This transition is enabled by the formation of a transient topological fluctuation state.

Excitons in various spin and valley configurations control the optical properties of ultrathin transition metal dichalcogenides. Here, the authors develop theoretical and experimental methods to determine the exciton g-factors for all possible spin-valley configurations of excitons in monolayer and bilayer WSe₂, including valley-indirect excitons.

PCSK9 regulates low density lipoprotein-cholesterol import and determines organ preference of metastatic pancreatic ductal adenocarcinoma, with PCSK9-low cells metastasizing to the liver and PCSK9-high cells preferring the lung.

Semiconductor nanoplatelets emit light in narrow spectral ranges. Here, the authors establish a theoretical model showing this behavior is controlled by the inhomogeneities of the ligand layer on the nanoplatelet surface.

Stable, single magnetic skyrmions are demonstrated at room temperature in ultrathin cobalt nanostructures.

An interconnect based on a low-loss detachable cable connection between two superconducting qubit devices can be used to create elementary quantum networks of interchangeable superconducting quantum devices.

Phonon polaritons are promising for mid-infrared photonics but only longitudinal optical phonons are directly accessed by electrical currents. Here, the authors predict and experimentally confirm hybrid longitudinal-transverse excitations. This could lead to phonon polariton-based electrically pumped mid-infrared emitters.

A deterministic correction of errors caused by qubit loss or leakage outside the computational space is demonstrated in a trapped-ion experiment by using a minimal instance of the topological surface code.

Genome-wide analyses identify 30 independent loci associated with obsessive–compulsive disorder, highlighting genetic overlap with other psychiatric disorders and implicating putative effector genes and cell types contributing to its etiology.

Mirrors that demonstrate 98% reflectivity and withstand 10 kilowatts of focused continuous-wave laser light are created by nanoscale fabrication of single-crystal diamond. The work finds applications in medicine, defence, industry, and communications.

Measurement-induced phase transitions are notoriously difficult to observe. Here, the authors propose a neural-network-based method to map measurement outcomes to the state of reference qubits, allowing observation of the transition and extracting its critical exponents.

The energy potentials created by laser light can trap atoms. An analogous effect that traps electrons in solid-state systems is now proposed. The electron traps are created in quantum wells and wires in the presence of quasiparticles composed of two electrons and a hole. The idea could lead to advances in ultrafast optical and new optoelectronic devices.

This study presents an analytic framework to link imaging-derived brain phenotypes to gene expression. In the future, this approach may facilitate in vivo pharmacotranscriptomics and the development of personalized (pharmacological) interventions.

The deterministic nucleation of single skyrmions at a controlled position along multilayered magnetic racetracks is demonstrated by exploiting spin-orbit torques without the need of in-plane magnetic fields.

The advantage of living in cities compared with rural areas with respect to height and BMI in children and adolescents has generally become smaller globally from 1990 to 2020, except in sub-Saharan Africa.

Quantum systems are subject to random phase errors that can dramatically affect the fidelity of a desired quantum operation or measurement, but existing quantum error correction techniques have large resource requirements, motivating a search for alternative strategies. The authors experimentally validate the use of the dynamical decoupling technique to suppress qubit error rates, using novel optimized pulse sequences that suppress errors by orders of magnitude compared to other existing sequences.

Sydnor et al. developed a new tractography atlas of thalamocortical structural connections and applied it to three youth samples. They uncovered coordinated development between thalamic connectivity and hierarchical cortical plasticity in humans.

The authors report upconversion in few-layer transition metal dichalcogenides, and attribute it to a resonant exciton-exciton annihilation involving a pair of dark excitons with opposite momenta, followed by the spontaneous emission of upconverted bright excitons.

Metamorphic soles beneath ophiolites record rapid subduction initiation, with high-temperature metamorphism that may be driven by relative motion across the plate interface, according to diffusion speedometry of garnets combined with isotopic data.

Whole-brain anatomical and activity surveys identify the lateral hypothalamus as a key driver of recovery from spinal cord injury, leading to a deep brain stimulation therapy that augments the recovery of walking in humans.

This study highlights sex differences in major depressive disorder using resting-state functional magnetic resonance imaging. Findings suggest hormonal fluctuations influence onset, emphasizing the need for larger investigations to identify sex-specific biomarkers and improve personalized treatment strategies.

The authors report that tensile strain applied to CsV₃Sb₅ strongly suppresses the charge-density-wave (CDW) gap, increases the mass of the fermions at the higher-order van Hove singularity (HO-VHS) and drives the energy of the HO-VHS towards the Fermi energy. Further, they suggest an important role of the HO-VHS in superconducting pairing.