Optimization of ultrafine entanglement witnesses

被引：6

作者：

Shen, Shu-Qian ^{[1
,2
]}

Xu, Ti-Run ^{[1
]}

Fei, Shao-Ming ^{[2
,3
]}

Li-Jost, Xianqing ^{[2
]}

Li, Ming ^{[1
]}

机构：

[1] China Univ Petr, Coll Sci, Qingdao 266580, Peoples R China

[2] Max Planck Inst Math Sci, D-04103 Leipzig, Germany

[3] Capital Normal Univ, Sch Mat Sci, Beijing 100048, Peoples R China

来源：

PHYSICAL REVIEW A | 2018年 / 97卷 / 03期

关键词：

SEPARABILITY; STATES;

D O I：

10.1103/PhysRevA.97.032343

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The ultrafine entanglement witness introduced by Shahandeh et al. [Phys. Rev. Lett. 118, 110502 (2017)] can seamlessly and easily improve any standard entanglement witness. In this paper, by combining the constraint and the test operators, we rotate the hyperplane determined by the test operator and further improve the original ultrafine entanglement witness. In particular, we present a series of ultrafine entanglement witnesses that not only can detect entangled states that the original ultrafine entanglement witnesses cannot detect, but also have the merits that the original ultrafine entanglement witnesses have.

引用

页数：4

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