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arXiv 2104.02848quant-ph
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混合态优化测不准关系的实验检验

Experimental test of the majorization uncertainty relation with mixed states

Shuang Wang, Fang-Xia Meng, Hui Wang, Cong-Feng Qiao

摘要:

不确定性关系是量子理论的核心,表现为对系统中不相容观测量的不确定性的非经典约束。在文献中,许多实验都致力于检验不确定关系,主要集中在纯态。在这项工作中,我们使用一系列混合度可调的混合态来测试三个不相容观测量的新的优化不确定关系,并比较各种熵不确定关系的紧致性。实验结果表明,对于一般的混合量子系统,优化测不准关系是对测不准的最严格约束,由优化测不准关系得到的熵测不准关系是最优的。我们的实验装置提供了一种制备混合态的简单方法,并且在此基础上可以利用简单的光学元件来实现所需的量子态。

英文摘要:

The uncertainty relation lies at the heart of quantum theory and behaves as a non-classical constraint on the indeterminacies of incompatible observables in a system. In the literature, many experiments have been devoted to the test of the uncertainty relations which mainly focus on the pure states. In this work we test the novel majorization uncertainty relations of three incompatible observables using a series of mixed states with adjustable mixing degrees, and compare the compactness of various entropy uncertainty relations. The experimental results confirm that for general mixed quantum system, the majorization uncertainty relation tends to be the tightest constraint on uncertainty, and indicate that the entropy uncertainty relation obtained from the majorzation uncertainty relation is the optimal one. Our experimental setup provides an easy means for preparing mixed states, and based on this simple optical elements can be utilized to realize the required 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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