Quantum entanglement and nonlocality properties of two-mode Gaussian squeezed states

被引：12
|
作者：
Shao-Hua, Xiang [1 ,2 ,3 ]
Bin, Shao [1 ]
Ke-Hui, Song [2 ,3 ]
机构：
[1] Beijing Inst Technol, Dept Phys, Beijing 100081, Peoples R China
[2] Huaihua Univ, Res Inst Informat Sci, Huaihua 418008, Peoples R China
[3] Huaihua Univ, Dept Phys & Elect Informat Sci, Huaihua 418008, Peoples R China
来源：
CHINESE PHYSICS B | 2009年 / 18卷 / 02期
基金：
中国国家自然科学基金;
关键词：
entanglement; nonlocality; Gaussian state; TELEPORTATION; SYSTEMS; MATRIX;
D O I：
10.1088/1674-1056/18/2/007
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Quantum entanglement and nonlocality properties of a family of two-mode Gaussian pure states have been investigated. The results show that the entanglement of these states is determined by both the two-mode squeezing parameter and the difference of the two single-mode squeezing parameters. For the same two-mode squeezing parameter, these states show larger entanglement than the usual two-mode squeezed vacuum state. The violation of Bell inequality depends strongly on all the squeezing parameters of these states and disappears completely in the limit of large squeezing. In particular, these states can exhibit much stronger violation of local realism than two-mode squeezed vacuum state in the range of experimentally available squeezing values.
引用
收藏
页码：418 / 425
页数：8
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