Quantifying Discriminating Strength for Gaussian States

被引：0

作者：

Ma, Rui-Fen ^{[1
,2
]}

Qi, Xiao-Fei ^{[1
,3
]}

Hou, Jin-Chuan ^{[4
]}

机构：

[1] Shanxi Univ, Dept Math, Taiyuan 030006, Shanxi, Peoples R China

[2] Taiyuan Univ Sci & Technol, Dept Math, Taiyuan 030024, Shanxi, Peoples R China

[3] Shanxi Univ, Inst Big Data Sci & Ind, Taiyuan 030006, Shanxi, Peoples R China

[4] Taiyuan Univ Technol, Dept Math, Taiyuan 030024, Shanxi, Peoples R China

来源：

COMMUNICATIONS IN THEORETICAL PHYSICS | 2018年 / 70卷 / 02期

关键词：

Gaussian states; discriminating strength; Gaussian unitary operators; quantum correlations; QUANTUM INFORMATION; FIDELITY;

D O I：

10.1088/0253-6102/70/2/127

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The discriminating strength DS (rho(A) (B)) induced by local Gaussian unitary operators for any (n + m)-mode Gaussian state rho(A) (B) is introduced in [Phys. Rev. A 83 (2011) 042325]. In this paper, we further discuss the quantity by restricting to Hilbert-Schmidt norm. The analytic formulas of DS for two-mode squeezed thermal states and mixed thermal states are given. Then, the relationship between D-S (rho(A) (B)) and D-S ((I circle times Phi)(rho(AB))) for some special Gaussian channels Phi is discussed. In addition, D-S is compared with Gaussian entanglement for symmetric squeezed thermal states.

引用

页码：127 / 131

页数：5

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