Novel results use intrinsic mixed-state properties of decohered topological quantum memory to characterize its optimal decoding threshold. Harvard Physics

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Microwave single-photon detection has been realized experimentally with a superconducting Josephson device operated near the parametric critical point. Aalto University

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A quantum-inspired classical method is employed to solve graph theory problems with a comparable performance to Gaussian boson sampling. Pritzker School of Molecular Engineering

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A novel platform based on multiterminal Josephson junctions in hybrid semiconductor-superconductor structures provides a potential path toward the realization of protected qubits. IFIMAC - Condensed Matter Physics Center

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A study unveils a step-by-step framework for engineering tunable entanglement between spin qubits in quantum dots via the sidebands of driven qubits, paving the way for modular quantum information processing in these solid-state platforms. Jake Taylor

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An experimental realization of 𝘪sᴡᴀᴘ and 𝘉 gates in fixed-coupling transmon processors shows that these systems support multiple high-fidelity native two-qubit gates. IBM Research

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A sufficient condition for universal quantum computation with continuous-variable systems is derived through a novel generalized mapping between bosonic and qubit states. Cameron Calcluth Chalmers University of Technology Wallenberg Centre for Quantum Technology - WACQT

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Three optimization tools that make fault-tolerant error correction more practical are introduced to reduce resource requirements and improve the performance of a wide class of quantum error-correcting codes. Balint Pato Kenneth Brown Shilin Huang

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New results on asymptotic state interconversion open the way for novel coherent thermodynamic protocols. Marco Tomamichel Christopher Chubb Joe Renes

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Nitrogen-vacancy centers in diamond can be used to access the state of optically dark paramagnetic nitrogen defects, which in turn can be used as quantum sensors to extract information about their local environment. Andy Martin Science at Melbourne

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Site-resolved control and detection of rotational states of molecules trapped in an array of optical tweezers is demonstrated, opening up applications in quantum metrology, simulation, and sensing. Simon Cornish

Article: go.aps.org/3JY4sLZ
Synopsis: go.aps.org/4bgz0F1

A novel quantum algorithm, which exploits the relation between the Lindblad master equation, stochastic differential equations, and Hamiltonian simulations, is proposed to simulate open quantum systems on a quantum computer. CIQC

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New theoretical work demonstrates how consistent models of effective classical-quantum dynamics emerge in a limit of quantum theory. Jonathan Oppenheim

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An algorithm, based on randomized compilation of the Hamiltonian terms, for high-precision quantum simulations is introduced. knakaji Mohsen Bagherimehrab Alan Aspuru-Guzik

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A new theoretical framework to account for collective quantum optical effects in the scattering of photons by atomic arrays. Weizmann Institute

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Group-equivariant quantum neural networks utilize symmetries to alleviate central challenges in trainability and generalization in quantum neural-network architectures. Los Alamos National Laboratory Louis Schatzki Martin Larocca Marco Cerezo

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A new study introduces quantum-informed recursive optimization algorithms, leveraging quantum resources for classical reductions in combinatorial optimization and demonstrating effectiveness on neutral-atom quantum processors. TU München

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High-fidelity two-qubit gates are achieved with heavy-fluxonium qubits that not only break conventional paradigms but also help diversify quantum applications. David Schuster

Article: go.aps.org/4b5nD2v
Synopsis: go.aps.org/3y4JGb6

Enhanced control over qubit interactions is achieved using a ring resonator, with a left-handed dispersion relation and a dense mode structure, as a coupling bus for qubits. Forschungszentrum Jülich | @[email protected] RWTH Aachen

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A framework for constructing qubit-efficient algorithms that sample properties of matrix functions is developed, with a concrete application for calculating Green’s functions of quantum many-body systems. Samson Wang Sam McArdle

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