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Tetrapartite Entanglement of GHZ State in Noninertial Frames
DOI: 10.12677/PM.2020.104033, PDF, HTML, XML, 下载: 340  浏览: 678

Abstract: In this paper, we investigate the entanglement of tetrapartite GHZ state by using the von Neumann entropy in noninertial frames. We assume that the observers are in an environment without any noise and we study the entanglement when 1~4 observers are accelerated with respect to others. It is found that the von Neumann entropy of the system increases with the increasing acceleration parameter.

1. 引言

2. 基本概念与知识

(1)

(2)

(3)

(4)

(5)

3. 非惯性系中四体GHZ态的纠缠

(6)

3.1. 一个观察者加速

3.2. 两个观察者有加速度

Figure 1. Curve: The as a function of the parameters r

(a) (b) (c)

Figure 2. Curve: (a) The as function of the acceleration parameters; (b) The as function of the acceleration parameters and; (c) The as a function of acceleration parameter for some given

3.3. 三个观察者加速

(a) (b)(c)

Figure 3. Curve: (a) the as function of the acceleration parameters r; (b) the as function of the acceleration parameters and; (c) as a function of acceleration parameter and for

3.4. 四个观察者都有加速度

Figure 4. Curve: the as a function of the parameters r

4. 总结

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