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• W2920155300 abstract "Quantum error correction is expected to be essential in large-scale quantum technologies. However, the substantial overhead of qubits it requires is thought to greatly limit its utility in smaller, near-term devices. Here we introduce a new family of special-purpose quantum error-correcting codes that offer an exponential reduction in overhead compared to the usual repetition code. They are tailored for a common and important source of decoherence in current experiments, whereby a register of qubits is subject to phase noise through coupling to a common fluctuator, such as a resonator or a spin defect. The smallest instance encodes one logical qubit into two physical qubits, and corrects decoherence to leading-order using a constant number of one- and two-qubit operations. More generally, while the repetition code on $n$ qubits corrects errors to order $t^{O(n)}$, with $t$ the time between recoveries, our codes correct to order $t^{O(2^n)}$. Moreover, they are robust to model imperfections in small- and intermediate-scale devices, where they already provide substantial gains in error suppression. As a result, these hardware-efficient codes open a potential avenue for useful quantum error correction in near-term, pre-fault tolerant devices." @default.
• W2920155300 created "2019-03-11" @default.
• W2920155300 creator A5025428128 @default.
• W2920155300 creator A5043858190 @default.
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• W2920155300 date "2020-01-17" @default.
• W2920155300 modified "2023-10-12" @default.
• W2920155300 title "Efficient Quantum Error Correction of Dephasing Induced by a Common Fluctuator" @default.
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• W2920155300 doi "https://doi.org/10.1103/physrevlett.124.020504" @default.
• W2920155300 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/32004019" @default.
• W2920155300 hasPublicationYear "2020" @default.
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