Dynamics of Bell-nonlocality of two-mode squeezed vacuum fields interacting with atoms

Dynamics of Bell-nonlocality of two-mode squeezed vacuum fields interacting with atoms
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与原子相互作用的二模压缩真空场的贝尔非局域性动力学

DOI:
10.1016/j.optcom.2011.02.072
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发表时间:
2011-06
影响因子:
2.4
通讯作者:
Miao, Long
Miao, Long
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Chen, Rong-Xin;Hu, Chun;Miao, Long

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我们考虑一个由两个独立腔体组成的系统,其腔场最初是在双模式压缩真空状态(TMSVS)下准备的。我们研究了与一两个原子相互作用的场的贝尔非局域性的短时演化。结果表明,场的贝尔不等式破坏可以在有限时间内被完全破坏,并在以后的时间中重新出现。在某些情况下,贝尔非局域性猝死(BNSD)后,当场的压缩参数较小时,场的贝尔非局域性几乎但不完全恢复到其初始值。贝尔非局域性演化的模式取决于场的压缩参数、原子跃迁和场频率之间的失谐以及原子场耦合之间的差异。
We consider a system of two separated cavities with the cavity fields initially prepared in a two-mode squeezed vacuum state (TMSVS). We investigate the short time evolution of Bell-nonlocality of the fields interacting with one or two atoms. It is shown that the Bell-inequality violation of the fields can be fully destroyed in a finite time and reappears in the later time. After Bell-nonlocality sudden death (BNSD) in some cases, Bell-nonlocality of the fields almost but does not totally return to its initial value when the squeezing parameter for the fields is small. The pattern of Bell-nonlocality evolution is dependent on the squeezing parameter of the fields, the detuning between the atomic transition and field frequency and the differences between atom-field couplings.
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