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- W4247366957 abstract "Abstract We show that a variant of the surface code—the XZZX code—offers remarkable performance for fault-tolerant quantum computation. The error threshold of this code matches what can be achieved with random codes (hashing) for every single-qubit Pauli noise channel; it is the first explicit code shown to have this universal property. We present numerical evidence that the threshold even exceeds this hashing bound for an experimentally relevant range of noise parameters. Focusing on the common situation where qubit dephasing is the dominant noise, we show that this code has a practical, high-performance decoder and surpasses all previously known thresholds in the realistic setting where syndrome measurements are unreliable. We go on to demonstrate the favorable sub-threshold resource scaling that can be obtained by specializing a code to exploit structure in the noise. We show that it is possible to maintain all of these advantages when we perform fault-tolerant quantum computation. We finally suggest some small-scale experiments that could exploit noise bias to reduce qubit overhead in two-dimensional architectures" @default.
- W4247366957 created "2022-05-12" @default.
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- W4247366957 date "2020-10-23" @default.
- W4247366957 modified "2023-09-24" @default.
- W4247366957 title "The XZZX surface code" @default.
- W4247366957 doi "https://doi.org/10.21203/rs.3.rs-90087/v1" @default.
- W4247366957 hasPublicationYear "2020" @default.
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