Enhancing the nonlocal advantage of quantum coherence by local parity-time (PT)-symmetric operation

被引：21

作者：

Wang, Long-Fei ^{[1
]}

Du, Ming-Ming ^{[1
]}

Sun, Wen-Yang ^{[1
]}

Wang, Dong ^{[1
,2
]}

Ye, Liu ^{[1
]}

机构：

[1] Anhui Univ, Sch Phys & Mat Sci, Hefei 230601, Anhui, Peoples R China

[2] Univ Sci & Technol China, CAS Key Lab Quantum Informat, Hefei 230026, Anhui, Peoples R China

来源：

LASER PHYSICS LETTERS | 2019年 / 16卷 / 05期

基金：

美国国家科学基金会;

关键词：

nonlocality of quantum coherence (NAQC); Bell nonlocality; quantum coherence; entanglement; parity-time (PI)-symmetric operation; PROBABILITY RELATIONS;

D O I：

10.1088/1612-202X/aafd1e

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this letter, we explore the dynamics and protection of nonlocal advantage of quantum coherence (NAQC) for an entangled two-qubit system subjected to a noisy environment by performing parity-time (PT) symmetric operations on one of the two particles. For comparison, we investigate the protection of Bell nonlocality, quantum coherence, and entanglement by local PT-symmetric operations. Here, we show that the NAQC, Bell nonlocality, quantum coherence, and entanglement of a bipartite entangled state can be improved effectively by the local PT-symmetric operation and verify that the protection effect is better with the increase of PT-symmetric operation strength.

引用

页数：6

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