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Steering-induced coherence in decoherence channels
Laser Physics Letters ( IF 1.7 ) Pub Date : 2021-04-01 , DOI: 10.1088/1612-202x/abf0ab
Shao-Jie Xiong 1 , Lu-Hong Zhang 2 , Jin-Ming Liu 1 , Zhe Sun 2
Affiliation  

We study steering-induced coherence (SIC) in local decoherence channels. Two types of channels are considered in this work, one is the amplitude damping channel under rotating-wave approximation (RWA) and the other the non-RWA channel. Unlike the amplitude damping channel, the system-environment interaction of the non-RWA channel is treated without RWA. We use the hierarchy equation method to calculate the dynamical evolution of SIC and B-side measurement-induced disturbance (MID). For the two channels, SIC decreases with time monotonically or oscillatingly due to the decoherence effect. Moreover, the different behavior of SIC between the two channels are also shown through the numerical results. SIC and MID obviously exhibit more oscillatory behavior in the non-RWA channel compared with the cases in the RWA channel. In some regions of system-environment coupling, the value of SIC (MID) in the non-RWA channel is larger than that in the RWA channel. However, in the strong non-Markovian regions, SIC (MID) drops to zero in the RWA channel, while it does not happen in the non-RWA channels. Additionally, we find that SIC can be generated from the states without entanglement.



中文翻译:

去相干通道中的转向引起的相干性

我们研究了局部退相干通道中的转向诱导相干 (SIC)。在这项工作中考虑了两种类型的通道,一种是旋转波近似(RWA)下的幅度阻尼通道,另一种是非 RWA 通道。与振幅阻尼通道不同,非 RWA 通道的系统-环境交互在没有 RWA 的情况下处理。我们使用层次方程方法来计算 SIC 和 B 侧测量引起的干扰 (MID) 的动态演化。对于两个通道,由于退相干效应,SIC 随时间单调或振荡减小。此外,还通过数值结果显示了两个通道之间 SIC 的不同行为。与 RWA 通道中的情况相比,SIC 和 MID 在非 RWA 通道中明显表现出更多的振荡行为。在系统-环境耦合的某些区域,非RWA通道中的SIC(MID)值大于RWA通道中的值。然而,在强非马尔可夫区域中,SIC (MID) 在 RWA 通道中降至零,而在非 RWA 通道中则不会发生。此外,我们发现 SIC 可以从没有纠缠的状态中生成。

更新日期:2021-04-01
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