Search

The Majorana Demonstrator experiment reports searches for the violation of the Pauli exclusion principle and of charge conservation. In the absence of a signal, exclusion limits for these processes are reported.

Measurements of a superconducting infinite-layer nickelate show that its upper critical field is largely isotropic despite its quasi-two-dimensional structure. This indicates that, unusually for layered oxides, the superconductivity is Pauli-limited.

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.

A key component of quantum error correction is the decoding algorithm, which needs to be accurate but also with a computational overhead that doesn’t lead to backlogs and allows fast logical clock rates. Here, the authors show an FPGA-driven decoder featuring a coarse-grained parallel architecture and on-the-fly error model updates, allowing both high accuracy and real-time operation.

Recently, an orbital Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state was predicted and identified in thin flakes of the transition metal dichalcogenide superconductor 2H-NbSe₂. Here, the authors present experimental evidence of the formation of this orbital FFLO state in bulk 2H-NbSe₂ samples.

Saturable absorption, a technologically relevant property of graphene, is usually explained with Pauli blocking of optically driven carriers in the strong-excitation regime. Here, Winzeret al. reveal a new saturation regime at low excitations, resulting in a double-bended saturation behaviour.

A superconducting quantum computer is used to realize an out-of-equilibrium topologically ordered state, which hosts anyonic excitations.

In a quantum simulation of a (2+1)D lattice gauge theory using a superconducting quantum processor, the dynamics of strings reveal the transition from deconfined to confined excitations as the effective electric field is increased.

Typical quantum error correcting codes assign fixed roles to the underlying physical qubits. Now the performance benefits of alternative, dynamic error correction schemes have been demonstrated on a superconducting quantum processor.

Learning Hamiltonians or Lindbladians of quantum systems from experimental data is important for characterization of interactions and noise processes in quantum devices. Here the authors propose an efficient protocol based on estimating time derivatives using multiple temporal sampling points and robust polynomial interpolation.

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

Hole spin qubits in germanium have seen significant advancements, though improving control and noise resilience remains a key challenge. Here, the authors realize a dressed singlet-triplet qubit in germanium, achieving frequency-modulated high-fidelity control and a tenfold increase in coherence time.

The wave equation was first discovered by the French scientist d’Alembert. It has since been intriguing, but so far unsuccessful to answer if ‘one-way’ versions of it might exist. Here, the authors report the discovery of such an equation in three dimensions, showing that it has a topological character.

Exotic six- and eight-particle excitonic complexes have recently been observed in 2D semiconductors. Here, the authors uncover a stable many-body exciton in WSe₂–comprising 20 interacting quasiparticles–that emerges when strong electrostatic doping fills the Q valley.

Colour code on a superconducting qubit quantum processor is demonstrated, reporting above-breakeven performance and logical error scaling with increased code size by a factor of 1.56 moving from distance-3 to distance-5 code.

A unitary protocol for braiding projective non-Abelian Ising anyons in a generalized stabilizer code is implemented on a superconducting processor, allowing for verification of their fusion rules and realization of their exchange statistics.

Physical realizations of qubits are often vulnerable to leakage errors, where the system ends up outside the basis used to store quantum information. A leakage removal protocol can suppress the impact of leakage on quantum error-correcting codes.

Scaling Si spin qubits relies on the uniform control of qubit-host interactions. This work finds correlations in qubit energy levels across a manufactured device arising from placement of Ge in the quantum well, consistent with atomistic modeling.

Finite momentum superconducting pairing refers to a class of unconventional superconducting states where Cooper pairs acquire a non-zero momentum. Here the authors report a new superconducting state in bulk 4Hb-TaS₂, where magnetic fields induce finite momentum pairing via magnetoelectric coupling.

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

The combination of graphene with plasmonic waveguides remains largely unexplored. Here, Ansell et al. report the fabrication of hybrid graphene plasmonic waveguide modulators working in the telecom range, with a modulation depth greater than 0.03 dB μm⁻¹and with comparable characteristics to silicon-based devices.

Monolayer transition-metal dichalcogenide (TMD) is promising to host features of topological superconductivity. Here, de la Barrera et al. study layered compounds, 2H-TaS₂ and 2H-NbSe₂, in their atomic layer limit and find a largest upper critical field for an intrinsic TMD superconductor.

A single logical qubit is encoded, manipulated and read out using a superposition of displaced squeezed states of the harmonic motion of a trapped calcium ion.

Multiple scattering with wave-like atoms is known to produce non-trivial many-body effects. Here, the authors investigate multiple scattering in the semi-classical limit using deviations in the scattering halos produced by the collision of indistinguishable ultracold fermions.

Here, the authors report pressure-induced superconductivity with concomitant enhancement of antiferromagnetic transition in layered EuTe₂. The superconductivity is distinctly characterized by the high upper critical fields exceeding the Pauli limit among binary tellurides, a prerequisite of the coexistence of ferromagnetism with superconductivity.

Superconductivity in the iron pnictides is believed to be related to quantum critical fluctuations. Putzke et al. observe unexpected anomalies in the critical fields of BaFe₂(As_1−xP_x)₂that emerge close to its magnetic critical point, which they argue is a generic feature of quantum critical superconductivity.

The study of lattice vibrations coupled to electronic excitations may provide an avenue for exploring exotic physical phenomena. Here, Xuet al. observe a Fano resonance in the Weyl semimetal TaAs, revealing evidence for a strong coupling between phonons and Weyl fermions.

Characterizing quantum states is vital for quantum information or metrology tasks, but it remains challenging. Here, by a combination of weak and strong measurements, the authors directly measure the probability amplitudes of a pure state in the orbital angular momentum basis with dimensionality of 27.

By forcing electron–hole pairs onto closed trajectories attosecond clocking of delocalized Bloch electrons is achieved, enabling greater understanding of unexpected phase transitions and quantum-dynamic phenomena.

Quantum communications operate with shared multipartite entangled states, and this has to be certified in a setting where not all parties are trusted in the same way. Here the authors propose a method to certify multipartite entanglement in asymmetric scenarios and demonstrate it in an optical experiment.

Liquid crystals on silicon (LCoS) devices are limited by the polarization sensitivity and reliance on complex architectures for full-color integration. Here, the authors demonstrate a metasurface-integrated LCoS device for polarisation-insensitive, full-color amplitude modulation on a single chip.

Nematicity, the spontaneous breaking of lattice rotational symmetry, plays an important role in kagome metals. Here, the authors report on a nematic phase within seven Kelvin below the charge density wave transition in the bilayer kagome metal ScV₆Sn₆.

Van der Waals heterostructures can be combined with metallic nanostructures to enable enhanced light–matter interaction. Here, the authors fabricate a broadband mechanical electro-optical modulator using a graphene/hexagonal boron nitride vertical heterojunction, suspended over a gold nanostripe array.

In quantum mechanics, the uncertainty principle is considered a limiting factor forbidding a system from being in a state where all possible measurements have perfectly predictable outcomes. Here, Dahlsten et al. show its positive role as the enabler of non-classical dynamics in an interferometer.

The interplay between electronic topology and superconductivity is of great current interest in condensed matter physics. Here, the authors unveil an unconventional two-dimensional superconducting state accompanied by a van Hove singularity in the recently discovered Dirac nodal line semimetal ZrAs₂, which is exclusively confined to the top and bottom surfaces.

The study combines bulk, single-cell, and spatial transcriptomics of human carotid plaques. It identifies immune– stromal cell diversity, spatial macrophage gradients, smooth muscle cell heterogeneity, and morphology-defined plaque subtypes.

A form of superconductivity where strong spin–orbit coupling combines with topological band inversions to produce strong robustness against magnetic fields is shown in a few-layer transition metal dichalcogenide.

Quantum computers promise to efficiently solve problems that would be practically impossible with a normal computer. Peruzzo et al. develop a variational computation approach that uses any available quantum resources and, with a photonic quantum processing unit, find the ground-state molecular energy of He–H⁺.

Excitonics provides a promising way to manipulate light-matter interactions for advanced optical applications, yet controlling core-exciton dynamics in the X-ray regime is challenging. Here, the authors combine experiments with an ab initio approach developed specifically for modelling pump-probe excitations, revealing how photoexcited carrier distributions can be used to control core-exciton resonances at absorption edges.

An ultra-low-loss integrated photonic chip fabricated on a customized multilayer silicon nitride 300-mm wafer platform, coupled over fibre with high-efficiency photon number resolving detectors, is used to generate Gottesman–Kitaev–Preskill qubit states.