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arXiv 2408.01299quant-ph
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远程超导量子比特系统的完整自测试

Complete Self-Testing of a System of Remote Superconducting Qubits

Simon Storz, Anatoly Kulikov, Josua D. Schär, Victor Barizien, Xavier Valcarce, Florence Berterottière, Nicolas Sangouard, Jean-Daniel Bancal, Andreas Wallraff

AI总结:

本文开发了缺失的理论,在相距30米的超导电路系统中实现了对Bell对生成和Pauli测量的完整自测试,以设备无关方式认证了至少58.9%的Bell态保真度和89.5%的测量保真度,推动了分布式量子计算与通信应用。

摘要:

自测试协议能够以设备无关的方式对量子系统进行认证,即无需了解被测量子设备的内部工作机制。在此,我们展示了针对超导电路的这种高标准表征程序,超导电路是构建大规模量子计算系统的重要平台。我们首先开发了缺失的理论,以实现对Pauli测量的自测试。随后,我们在一个由两个相距30米运行的纠缠超导电路组成的系统中,同时对Bell对生成和测量进行自测试,完成了一次完整的自测试。在基于1700万次试验的实验中,我们测得平均CHSH(Clauser-Horne-Shimony-Holt)S值为2.236。在不依赖对实验装置额外假设的情况下,我们以设备无关的方式认证了至少58.9%的平均Bell态保真度和至少89.5%的平均测量保真度,两者的置信度均为99%。这推动了超导电路在分布式量子计算与通信领域的应用,例如委托量子计算。

英文摘要:

Self-testing protocols enable the certification of quantum systems in a device-independent manner, i.e. without knowledge of the inner workings of the quantum devices under test. Here, we demonstrate this high standard for characterization routines with superconducting circuits, a prime platform for building large-scale quantum computing systems. We first develop the missing theory allowing for the self-testing of Pauli measurements. We then self-test Bell pair generation and measurements at the same time, performing a complete self-test in a system composed of two entangled superconducting circuits operated at a separation of 30 meters. In an experiment based on 17 million trials, we measure an average CHSH (Clauser-Horne-Shimony-Holt) S-value of 2.236. Without relying on additional assumptions on the experimental setup, we certify an average Bell state fidelity of at least 58.9% and an average measurement fidelity of at least 89.5% in a device-independent manner, both with 99% confidence. This enables applications in the field of distributed quantum computing and communication with superconducting circuits, such as delegated quantum computing.

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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