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Showing 1–12 of 12 results
Advanced filters: Author: Craig Gidney Clear advanced filters

  • For architectures with local connectivity, the surface code has been the leading approach to constructing fault-tolerant logical qubits, but typically requires over 1000 physical qubits per logical qubit. Here, the authors introduce a hierarchical code that maintains the same connectivity requirements as the surface code while reducing the physical qubit overhead by up to a factor of three.

    • Craig Gidney
    • Michael Newman
    • Cody Jones
    ResearchOpen Access
    Nature Communications
    Volume: 16, P: 1-12

  • 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.

    • Alec Eickbusch
    • Matt McEwen
    • Alexis Morvan
    ResearchOpen Access
    Nature Physics
    Volume: 21, P: 1994-2001

  • 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.

    • Dmitry A. Abanin
    • Rajeev Acharya
    • Nicholas Zobrist
    ResearchOpen Access
    Nature
    Volume: 646, P: 825-830

  • A recurrent, transformer-based neural network, called AlphaQubit, learns high-accuracy error decoding to suppress the errors that occur in quantum systems, opening the prospect of using neural-network decoders for real quantum hardware.

    • Johannes Bausch
    • Andrew W. Senior
    • Pushmeet Kohli
    ResearchOpen Access
    Nature
    Volume: 635, P: 834-840

  • 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.

    • Kevin C. Miao
    • Matt McEwen
    • Yu Chen
    ResearchOpen Access
    Nature Physics
    Volume: 19, P: 1780-1786

  • A study establishes a scalable approach to engineer and characterize a many-body-localized discrete time crystal phase on a superconducting quantum processor.

    • Xiao Mi
    • Matteo Ippoliti
    • Pedram Roushan
    ResearchOpen Access
    Nature
    Volume: 601, P: 531-536

  • It is hoped that quantum computers may be faster than classical ones at solving optimization problems. Here the authors implement a quantum optimization algorithm over 23 qubits but find more limited performance when an optimization problem structure does not match the underlying hardware.

    • Matthew P. Harrigan
    • Kevin J. Sung
    • Ryan Babbush
    Research
    Nature Physics
    Volume: 17, P: 332-336

  • Quantum supremacy is demonstrated using a programmable superconducting processor known as Sycamore, taking approximately 200 seconds to sample one instance of a quantum circuit a million times, which would take a state-of-the-art supercomputer around ten thousand years to compute.

    • Frank Arute
    • Kunal Arya
    • John M. Martinis
    Research
    Nature
    Volume: 574, P: 505-510

  • Two below-threshold surface code memories on superconducting processors markedly reduce logical error rates, achieving high efficiency and real-time decoding, indicating potential for practical large-scale fault-tolerant quantum algorithms.

    • Rajeev Acharya
    • Dmitry A. Abanin
    • Nicholas Zobrist
    ResearchOpen Access
    Nature
    Volume: 638, P: 920-926