Robustness-optimized quantum error correction

Robustness-optimized quantum error correction
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鲁棒性优化的量子纠错

DOI:
10.1088/2058-9565/ab79b2
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发表时间:
2020
影响因子:
6.7
通讯作者:
Cappellaro, Paola
Cappellaro, Paola
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Layden, David;Huang, Louisa Ruixue;Cappellaro, Paola

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量子纠错(QEC)码通常被设计为纠正错误,而不管它们的物理来源。在大型设备中,这是一个基本特征。然而,在较小规模的设备中,通常可以理解主要的误差源,并且可以利用这些知识进行更有效的纠错。因此,优化QEC协议在较小的设备中是一种有前途的策略。通常,这涉及通过解决适当的优化问题来将协议定制到给定的去相干信道。在这里,我们介绍了一种新的基于优化的方法,最大限度地提高了恢复故障的鲁棒性。我们的方法受到最近实验的启发,这些故障是逻辑错误的重要来源。我们用一个三量子比特模型来说明这种方法,并展示了短期实验如何从更强大的QEC协议中受益。
Quantum error correction (QEC) codes are usually designed to correct errors regardless of their physical origins. In large-scale devices, this is an essential feature. In smaller-scale devices, however, the main error sources are often understood, and this knowledge could be exploited for more efficient error correction. Optimizing the QEC protocol is therefore a promising strategy in smaller devices. Typically, this involves tailoring the protocol to a given decoherence channel by solving an appropriate optimization problem. Here we introduce a new optimization-based approach, which maximizes the robustness to faults in the recovery. Our approach is inspired by recent experiments, where such faults have been a significant source of logical errors. We illustrate this approach with a three-qubit model, and show how near-term experiments could benefit from more robust QEC protocols.
DOI: --
发表时间: 2009
影响因子: 8.6
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