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arXiv 2201.05032quant-ph
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量子网络自测试所有纠缠态

Quantum networks self-test all entangled states

Ivan Šupić, Joseph Bowles, Marc-Olivier Renou, Antonio Acín, Matty J. Hoban

AI总结:

研究提出网络辅助自测试框架,实现对任意数量系统的纯纠缠量子态的自测试,认证强度超越Bell型场景,解决了多体量子态自测试的开放问题。

摘要:

在最少假设下认证量子性质是量子信息科学中的一个基本问题。自测试是一种仅从测量统计中推断量子实验底层物理的方法。虽然所有二分纯纠缠态都可以被自测试,但关于如何自测试任意数量系统的量子态却知之甚少。在此,我们引入了一种网络辅助自测试框架,并用它来对任意数量系统的任何纯纠缠量子态进行自测试。该方案需要制备数量随系统数量线性扩展的singlet,并执行标准的投影测量和Bell测量,这些在当前技术下都是可行的。当利用所有网络约束时,所获得的自测试认证比在任何Bell型场景中可实现的都要强。我们的工作不仅解决了该领域的一个开放问题,还展示了合理设计的网络如何为量子现象的认证提供新机遇。

英文摘要:

Certifying quantum properties with minimal assumptions is a fundamental problem in quantum information science. Self-testing is a method to infer the underlying physics of a quantum experiment only from the measured statistics. While all bipartite pure entangled states can be self-tested, little is known about how to self-test quantum states of an arbitrary number of systems. Here, we introduce a framework for network-assisted self-testing and use it to self-test any pure entangled quantum state of an arbitrary number of systems. The scheme requires the preparation of a number of singlets that scales linearly with the number of systems, and the implementation of standard projective and Bell measurements, all feasible with current technology. When all the network constraints are exploited, the obtained self-testing certification is stronger than what is achievable in any Bell-type scenario. Our work does not only solve an open question in the field, but also shows how properly designed networks offer new opportunities for the certification of quantum phenomena.

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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