Quantum Locality of N Entangled States

Quantum Locality of N Entangled States
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N 纠缠态的量子局域性

DOI:
10.1007/s10773-020-04484-3
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发表时间:
2020-06
影响因子:
1.4
通讯作者:
Wang QingLe
Wang QingLe
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Zhou YuQian;Zhang ZhiYi;Li Dan;Wang QingLe

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量子纠缠的非定域性研究对量子力学理论和量子信息技术的发展具有重要意义。多体纠缠态是一种稀有的量子资源,其非定域性研究一直是量子理论研究的重要课题。本文主要研究由N个纠缠态的副本组成的N个纠缠态。首先,提出了一种新的N纠缠态Bell检验方法,并利用提升Bell不等式证明了非定域性。第二,通过提升Bell不等式的宇称分仓,得到了N纠缠态的非定域性证明标准。第三,通过提升Bell不等式证明了N + 2纠缠态是局域纠缠态的猜想。该研究将推动量子相干性的理论研究进展,为多体纠缠态在量子密码协议中的应用提供理论基础和技术支持。
The nonlocality research of quantum entanglement plays an important role in the development of quantum mechanics theory and quantum information technology. As multipartite entangled state is a rare quantum resource, its nonlocality research has always been an important subject in the study of quantum theory. In this paper, we focus on N entangled states composed of N copies of an entangled state. First, a new Bell test with respect to N entangled states is presented, and lifting Bell inequalities are applied to certify nonlocality. Second, we obtain the nonlocality certification standard of N entangled states by parity binning lifting Bell inequality. Third, we prove the conjecture that N + 2 entangled states must be local if N entangled states are local certified by parity binning lifting Bell inequality. The research will promote the theoretical research progress of quantum coherence, and provide theoretical basis and technical support for the multipartite entangled states application in quantum cryptographic protocols.
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