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Many-body quantum systems that escape thermalization are promising candidates for quantum information applications. A weak-ergodicity-breaking mechanism—quantum scarring—has now been observed with superconducting qubits in unconstrained models.

A general approach to simplifying quantum logic circuits—the ‘programs’ of quantum computers—is described and demonstrated on a platform based on photonic qubits.

Analogue quantum simulation has looser experimental requirements than its digital counterpart, but rigorous theoretical results on the capabilities of realisable experiments are scarce. Here, the authors fill this gap by proposing an alternative mathematical framework, and showing how to overcome barriers to scalable implementations using additional resources such as engineered dissipation.

Bergel et al. show that an infraslow rhythm connecting the brain and body during sleep is shared by lizards, mammals and birds, revealing an ancestral process and reshaping our understanding of the evolution of sleep states.

There are many quantum systems that act as high-quality quantum harmonic oscillators, and they can be used to store quantum information using the Gottesman–Kitaev–Preskill code. Entangling gates have now been demonstrated between two of these qubits.

Quantum error correction of a logical qutrit and ququart were experimentally realized beyond the break-even point with the Gottesman–Kitaev–Preskill bosonic code.

Parity-time symmetry breaking and related non-Hermitian phenomena, such as high-order exceptional points, have attracted significant interest across various experimental platforms. Here the authors demonstrate a third-order exceptional point induced by parity-time symmetry breaking in a dissipative trapped ion.

The usual definition of external time is unlikely to survive if we want to unite quantum mechanics and relativity. Here the authors consider two quantum clocks moving in curved spacetime and formulate the probability distribution that relates their proper times, allowing them to explore quantum time dilation.

Researchers developed a nano-resolution, multi-material, and multi-layer printing method for the colloidal nanocrystal library. The electrohydrodynamic technique is enabled by in-situ ligand treatments to achieve fully printed infrared photodiodes.

The development of neural interfaces at subcortical nuclei surfaces is challenging. The authors present a flexible, minimally invasive neural interface that self-unfolds in cerebrospinal fluid to conform to periventricular surfaces, enabling long-term monitoring of deep brain disorders.

Using a new analytical method for tracking gamma band events in mouse visual cortex, flexible encoding of visual information according to behavioural context is shown.

The wave function contains all the information about the electrons in chemical systems. Here, authors interpolate this quantum variable through chemical interactions, allowing us to follow the electronic state as atoms move and react.

Photons are essential for quantum information processing, but to date only two-qubit single-photon operations have been realized. Here the authors demonstrate experimentally a three-qubit single-photon linear deterministic quantum gate by exploiting polarization along with spatial-parity symmetry.

Quantum computing has advantages over conventional computing, but the complexity of quantum algorithms creates technological challenges. Here, an architecture-independent technique, that simplifies adding control qubits to arbitrary quantum operations, is developed and demonstrated.

Exotic quantum states can be advantageous for sensing, but are very fragile, so that some form of quantum error correction is needed. Here, the authors show how approximate QEC helps overcoming decoherence due to noise when measuring the excitation population of a receiver mode in a superconducting circuit.

A longstanding question in quantum information is the validity of the disputed Peres conjecture stating that bound entangled state can never lead to Bell inequality violation. Here Vértesi and Brunner prove that the Peres conjecture is false by providing an explicit counter example.

Reaching a quantum advantage in metrology usually requires hard-to-prepare two-mode entangled states such as NOON states. Here, instead, the authors demonstrate single-mode phase estimation using Fock states superpositions in a superconducting qubit-oscillator system.

Magnetic refrigeration leverages the magnetocaloric effect, necessitating materials with specific properties for optimal performance. Here, the authors explore Gd₂CrSbO₇, a mixed B-site pyrochlore oxide, revealing its significant cryogenic magnetocaloric effect driven by 4f–3d exchange interactions, positioning it as a cost-effective alternative to traditional refrigerants with potential for next-generation cooling technologies.

The brain and body are necessarily connected. Here the authors show that brain blood flow and electrical activity are coupled with systemic physiological changes in the body.

The spins in quantum magnets couple to each other through an exchange interaction. Here, the authors show that a weak coupling between neighbouring spins called the Dzyaloshinskii–Moriya interaction can give rise to topological behaviour in the archetypal quantum magnet strontium copper borate.

Qudit-based quantum devices can outperform qubit-based ones, but a programmable qudit-based quantum computing device is still missing. Here, the authors fill this gap using a programmable silicon photonic chip employing ququart-based encoding, showing the scaling advantages compared to the qubit counterpart.

Digital quantum simulations of Kitaev’s honeycomb model are realized for two-dimensional fermionic systems using a reconfigurable atom-array processor and used to study the Fermi–Hubbard model on a square lattice.

Some many-body problems are challenging to solve in real space, but have a convenient Fock-space representation. A superconducting qubit experiment now demonstrates the benefits of this approach for the study of quantum dynamics and criticality.

Xenotransplantation of a genetically edited pig kidney with a thymic autograft into a brain-dead human for 61 days with immunosuppression resulted in stable kidney function without proteinuria, and xenograft rejection was treated and reversed by the end of the study.

How various factors dynamically influence neuronal variability is a longstanding question. Here, the authors build an encoding model to partition variability, revealing heterogeneous source contributions to individual units and state-dependent changes of variability across the visual hierarchy.

Quantum speed limits are fundamental constraints on the speed of quantum state evolution. Here, the authors observe the known maximal quantum speed limits for few and many-body states on a superconducting quantum processor and identify the minimal quantum speed limits, which are less common than maximal ones.

Most quantum technologies rely upon quantum wires to ensure the faithful transfer of quantum states between remote locations—a process that is especially vulnerable to decoherence. Yao et al.propose a means to harness topological protection to design a quantum wire that is intrinsically robust against decoherence.

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.

An Fe^III/V redox mechanism in Li₄FeSbO₆ on delithiation without Fe^IV or oxygen formation with resistance to aging, high operating potential and low voltage hysteresis is demonstrated, with implications for Fe-based high-voltage applications.

Probabilistic computing has emerged as a powerful route for tackling hard optimization. Here, authors show p-computers co-designed with modern hardware to run Monte Carlo algorithms solve hard optimization efficiently and establish a rigorous classical baseline to assess practical quantum advantage.

Recently, material realizations of the spin 3/2 Kitaev honeycomb model have been proposed, but the model has not been solved by either analytical or numerical methods. Here the authors report exact results for the spin 3/2 model consistent with numerical simulations, and find gapped and gapless quantum spin liquids.

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.

Many-body localization—a phenomenon where an isolated system fails to reach thermal equilibrium—has been studied with a programmable quantum processor, which reveals the crucial role played by the initial energy on the onset of localization.

A 1,024-channel microelectrode array is delivered to the brain cortex via a minimally invasive incision in the skull and dura, and allows recording, stimulation and neural decoding across large portions of the brain in porcine models and human neurosurgical patients.

Biased noise qubits, which can selectively suppress certain types of noise, are advantageous for quantum error correction of bosonic codes. Here the authors make an important step in this direction by demonstrating quantum control of a harmonic oscillator with a biased noise qubit.

The electrodynamics of superconducting devices make them suitable for applications as detectors, amplifiers, and qubits. Here the authors show that resonators made from granular aluminum, which naturally realizes a network of Josephson junctions, have practically useful impedances and nonlinearities.

Researchers present a photonic demonstration of a full quantum algorithm without knowing the answer in advance. The unknown eigenvalues are truly calculated by the iterative phase estimation algorithm circuit. The demonstrated scheme is essential for practical applications of the phase estimation algorithm, including quantum simulations, quantum metrology and factoring.

By implementing random circuit sampling, experimental and theoretical results establish the existence of transitions to a stable, computationally complex phase that is reachable with current quantum processors.

Quantum computing platforms allowing quantum error correction usually rely on complex redundant encoding within multiple two-level systems. Here, instead, the authors realize a CNOT gate between two qubits encoded in the multiphoton states of two microwave cavities nonlinearly coupled by a transmon.