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arXiv 2108.09100quant-phcs.CR
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基于能量界的半器件无关全随机放大

Semi-device-independent full randomness amplification based on energy bounds

Gabriel Senno, Antonio Acín

摘要:

量子贝尔非定域性允许设计协议,放大公共和任意偏见的Santha-Vazirani源的随机性,这是一个经典的不可能的任务。这些协议中的信息理论安全性以设备无关的方式进行认证,即仅从观察到的非本地统计数据中进行认证,而不对介入设备的内部工作进行任何假设。另一方面,如果一个人愿意相信协议设备的完整量子力学描述,那么在一对相互无偏的基础上交替测量量子位的基本方案,直截了当地说,就是随机性放大的协议。在这项工作中,我们研究了未探索的中间地带。我们证明了完全的随机性放大可以实现,而不需要纠缠或干预量子态和测量的完整表征。基于在[Van Himbeeck等人,量子1,33(2017)],我们的测量和测量协议能够放大任何公共Santha-Vazirani源的随机性,需要尽可能少的输入和结果,并对量子对手安全。

英文摘要:

Quantum Bell nonlocality allows for the design of protocols that amplify the randomness of public and arbitrarily biased Santha-Vazirani sources, a classically impossible task. Information-theoretical security in these protocols is certified in a device-independent manner, i.e. solely from the observed nonlocal statistics and without any assumption about the inner-workings of the intervening devices. On the other hand, if one is willing to trust on a complete quantum-mechanical description of a protocol's devices, the elementary scheme in which a qubit is alternatively measured in a pair of mutually unbiased bases is, straightforwardly, a protocol for randomness amplification. In this work, we study the unexplored middle ground. We prove that full randomness amplification can be achieved without requiring entanglement or a complete characterization of the intervening quantum states and measurements. Based on the energy-bounded framework introduced in [Van Himbeeck et al., Quantum 1, 33 (2017)], our prepare-and-measure protocol is able to amplify the randomness of any public Santha-Vazirani source, requiring the smallest number of inputs and outcomes possible and being secure against quantum adversaries.

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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