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arXiv 1909.12759quant-ph
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使用单拷贝自测试协议的量子态张量积的设备无关认证

Device-independent certification of tensor products of quantum states using single-copy self-testing protocols

Ivan Šupić, Daniel Cavalcanti, Joseph Bowles

摘要:

自测试协议是在设备无关的场景中确定共享纠缠态存在的方法,其中对协议中涉及的测量没有任何假设。被称为并行自测试的特定类型的自测试协议可以证明状态的副本的存在,然而,这样的协议通常遭受需要相对于旨在证明的副本的数量而增加的测量的数量的问题。在这里,我们提出了一个程序,将单拷贝自测试协议转换为一个程序,证明任意数量(不一定相等)的量子态的张量积,而不增加的缔约方或测量选择的数量。此外,我们证明了自我测试协议,证明了一个国家和排名一测量总是可以并行化,以证明许多副本的状态。我们的研究结果提供了一种利用高维量子态实现与器件无关的无界随机展开的方法。

英文摘要:

Self-testing protocols are methods to determine the presence of shared entangled states in a device independent scenario, where no assumptions on the measurements involved in the protocol are made. A particular type of self-testing protocol, called parallel self-testing, can certify the presence of copies of a state, however such protocols typically suffer from the problem of requiring a number of measurements that increases with respect to the number of copies one aims to certify. Here we propose a procedure to transform single-copy self-testing protocols into a procedure that certifies the tensor product of an arbitrary number of (not necessarily equal) quantum states, without increasing the number of parties or measurement choices. Moreover, we prove that self-testing protocols that certify a state and rank-one measurements can always be parallelized to certify many copies of the state. Our results suggest a method to achieve device-independent unbounded randomness expansion with high-dimensional quantum states.

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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