Quantum manipulation of asymmetric Einstein–Podolsky–Rosen steering in controllable dynamical Casimir arrays  

作　　者：Ruinian Li Yumei Long Xue Zhang 李瑞年;龙玉梅;张雪

机构地区：[1]Center for Quantum Sciences and School of Physics,Northeast Normal University,Changchun 130024,China

出　　处：《Chinese Physics B》2025年第2期149-163,共15页中国物理B(英文版)

基　　金：Project supported by the Education Department of Jilin Province,China(Grant No.JJKH20231291KJ)。

摘　　要：We design dynamical Casimir arrays(DCA)consisting of giant atoms and coupled resonator waveguides(CRWs)to investigate the Einstein–Podolsky–Rosen(EPR)steering at finite temperatures.Our designed system exhibits an asymmetry in its structure,which is caused by the differences in the sizes and the coupling positions of the giant atoms.The system achieves different types of EPR steering and the reversal of one-way EPR steering by modulating parameters.Furthermore,the symmetry and asymmetry of the system structure,in their responses to parameter modulation,both reveal the asymmetry of EPR steering.In this process,we discover that with the increase in temperature,different types of steering can be transferred from Casimir photons to giant atoms.We also achieve the monogamy of the multipartite system.These results provide important assistance for secure quantum communication,and further intuitively validating the asymmetry of EPR steering from multiple perspectives.

关 键 词：dynamical Casimir effect EPR steering monogamy relation giant atoms coupled resonator waveguides 

分 类 号：O41[理学—理论物理]