Quantum Fisher Information of Superposition of Many-Body GHZ-Class State and W State

被引：0
|
作者：
Huang, Jian [2 ]
Huang, Guo-qiang [1 ]
机构：
[1] Jiangxi Univ Finance & Econ, Nanchang 330013, Peoples R China
[2] Jiangxi Univ Finance & Econ, Sch Software & Commun Engn, Nanchang 330013, Peoples R China
来源：
INTERNATIONAL JOURNAL OF THEORETICAL PHYSICS | 2011年 / 50卷 / 11期
关键词：
Quantum Fisher information; Superpositions; GHZ-class state; W state; AGENT CONTROLLED TELEPORTATION; STATISTICAL DISTANCE; QUDIT STATE; ENTANGLEMENT;
D O I：
10.1007/s10773-011-0854-3
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We investigate the properties of quantum Fisher information in a general superposition of many-body GHZ-class state and W state. It is shown that mean spin direction is determined by the superposed coefficients and the relative phase between the GHZ-class state and the W state and it is independent of the relative phase between the GHZ-class state; while mean spin length and quantum Fisher information are only determined by the superposed coefficients.
引用
收藏
页码：3475 / 3480
页数：6
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