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arXiv 2108.12432quant-ph
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主动读出错误缓解

Active Readout Error Mitigation

Rebecca Hicks, Bryce Kobrin, Christian W. Bauer, Benjamin Nachman

摘要:

减少错误是近期量子计算机面临的重大挑战。最重要的误差源之一与将量子态读出到经典比特流中有关。已经提出了各种技术来减轻这些错误与事后校正。我们提出了一种互补方案,通过在读出之前立即将单个量子比特编码为多量子比特状态,来主动减少逐个拍摄的读出错误。我们的技术的计算资源是独立的电路深度,并与当前的硬件错误率和连接完全兼容。我们使用两种类型的纠错码分析了我们的方法的潜力,作为原理证明,在IBMQ Mumbai量子计算机上,读出误差提高了80%。

英文摘要:

Mitigating errors is a significant challenge for near term quantum computers. One of the most important sources of errors is related to the readout of the quantum state into a classical bit stream. A variety of techniques have been proposed to mitigate these errors with post-hoc corrections. We propose a complementary scheme to actively reduce readout errors on a shot-by-shot basis by encoding single qubits, immediately prior to readout, into multi-qubit states. The computational resources of our technique are independent of the circuit depth and fully compatible with current hardware error rates and connectivity. We analyze the potential of our approach using two types of error-correcting codes and, as a proof of principle, demonstrate an 80% improvement in readout error on the IBMQ Mumbai quantum computer.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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