Radiative processes of two entangled atoms in cosmic string spacetime
Radiative processes of two entangled atoms in cosmic string spacetime
复制标题
宇宙弦时空中两个纠缠原子的辐射过程
DOI：
10.1088/1361-6382/aa9d49
复制
发表时间：
2018-01-25
影响因子：
3.5
通讯作者：
Ren, Zhongzhou
中科院分区：
文献类型：
--
作者：
Cai, Huabing;Ren, Zhongzhou
研究了宇宙弦时空中两个处于最大纠缠态的静态二能级原子与真空电磁场耦合时的辐射过程。我们发现从纠缠态到基态的衰减速率主要取决于原子间距、原子的极化方向、原子与弦的距离以及弦引起的亏损角。在闵可夫斯基时空中，随着原子-弦距离的增加，衰变率在结果附近振荡，振幅逐渐减小。平面角亏损越大，振荡越严重。我们分析了在不同情况下的衰减率，如近区和特定的极化情况。对对称态和反对称态进行了比较。通过与闵可夫斯基时空的对比，我们可以揭示宇宙弦对纠缠原子辐射性质的影响。
We investigate the radiative processes of two static two-level atoms in a maximally entangled state coupled to vacuum electromagnetic field in the cosmic string spacetime. We find that the decay rate from the entangled state to the ground state crucially depends on the atomic separation, the polarization directions of the individual atoms, the atom-string distance and the deficit angle induced by the string. As the atom-string distance increases, the decay rate oscillates around the result in Minkowski spacetime and the amplitude gradually decreases. The oscillation is more severe for larger planar angle deficit. We analyze the decay rate in different circumstances such as near zone and specific polarization cases. Some comparisons between symmetric and antisymmetric states are performed. By contrast with the case in Minkowski spacetime, we can reveal the effects of the cosmic string on the radiative properties of the entangled atoms.