Entanglement measures of a new type pseudo-pure state in accelerated frames
在加速的框架的一个新类型伪 pure 状态的纠纷措施作者机构：Laboratorio de Informacion CuanticaCIDETECInstituto Polit .crrico NacionalUPALMCD MX 07700Mexico Catedratica CONACyTCentro de Investigacion en ComputacionInstituto Politecnico NacionalUPALMMexico D. F. 07700Mexico Faculty of ScienceXi'an University of Architecture and TechnologyXi'an 710055China
出 版 物：《Frontiers of physics》 (物理学前沿（英文版）)
年 卷 期：2019年第14卷第2期
页 面：23-29页
核心收录：
基 金：supported by project 20180677-SIP-IPN,COFAA-IPN,Mexico partially by the CONACYT project
主 题：negativity pseudo-pure state noninertial frame entanglement von Neumann entropy concurrence
摘 要：In this work we analyze the characteristics of quantum entangleinent of the Dirac field in noninertial reference frames in the context of a new type pseudo-pure state, which is composed of the Bell states. This will help us to understand the relationship between the relativity and quantum information theory. Some states will be changed from entangled states into separable ones around the critical value F = 1/4, but there is no such a critical value for the variable y related to acceleration a. We find that the negativity Nas (ρ^TA AB 1) increases with F but decreases with the variable y、while the variation of the negativity Nb1b11(ρ^TB1 B1B11)is opposite to that of the negativity N AB1(ρ^TA AB1). We also study the von Neumann entropies S(ρAB1) and S(ρB1B11)、We find that the S(ρAB1) increases with variable y but S(ρB1B11) is independent of it. However, both S(ρAB1) and S(ρB1B11) first decreases with F and then increases with it. The concurrences C(ρAB1) and C(ρB1B11) are also discussed. We find that the former decreases with y while the latter increases with y but both of them first increase with F and then decrease with it.
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