Witness based nonlinear detection of quantum entanglement

IF 4.6 2区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

iScience Pub Date : 2025-03-10 DOI:10.1016/j.isci.2025.112174

Yiding Wang , Tinggui Zhang , Xiaofen Huang , Shao-Ming Fei

引用次数: 0

Abstract

We present a nonlinear entanglement detection strategy which detects entanglement that the linear detection strategy fails. We show that when the nonlinear entanglement detection strategy fails to detect the entanglement of an entangled state with two copies, it may succeed with three or more copies. Based on our strategy, a witness combined with a suitable quanutm mechanical observable may detect the entanglement that can not be detected by the witness alone. Moreover, our strategy can also be applied to detect multipartite entanglement by using the witnesses for bipartite systems, as well as to entanglement concentrations.

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基于见证的量子纠缠非线性检测

提出了一种非线性纠缠检测策略，可以检测出线性检测策略无法检测到的纠缠。研究表明，当非线性纠缠检测策略无法检测到具有两个副本的纠缠态时，可以检测到具有三个或更多副本的纠缠态。基于我们的策略，一个证人与一个合适的量子力学观测相结合，可以探测到证人单独无法探测到的纠缠。此外，我们的策略也可以应用于通过使用双部系统的证人来检测多部纠缠，以及纠缠浓度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

iScience Multidisciplinary-Multidisciplinary

CiteScore

7.20

自引率

1.70%

发文量

1972

审稿时长

6 weeks

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