Zeno effect of an open quantum system in the presence of 1/f noise
Zeno effect of an open quantum system in the presence of 1/f noise
复制标题
存在 1/f 噪声时开放量子系统的芝诺效应
DOI：
10.1103/physreva.97.022108
复制
发表时间：
2018-02-20
影响因子：
2.9
通讯作者：
Chen, Qing-Hu
中科院分区：
文献类型：
--
作者：
He, Shu;Wang, Chen;Chen, Qing-Hu
研究了与1/f噪声环境相互作用的二能级系统（TLS）中的量子芝诺效应（QZE）和量子反芝诺效应（QAZE）。利用基于热场动力学理论和矩阵积态的数值精确方法，我们得到了在零温度和有限温度下重复测量的TLS和镀液（环境）的精确演变。在零温度下，考虑测量诱导的非马尔可夫效应，我们观察到从短时间尺度的纯QZE到长时间尺度的QZE- qaze交叉的转变。在有限温度下，热波动抑制了短时间尺度上的生存概率衰减，而增强了长时间尺度上的生存概率衰减。
We study the quantum Zeno effect (QZE) and quantum anti-Zeno effect (QAZE) in a two-level system (TLS) interacting with an environment that has 1/f noise. Using a numerically exact method based on the thermofield dynamics theory and the matrix product states, we obtain exact evolutions of the TLS and bath (environment) under repetitive measurements at both zero and finite temperatures. At zero temperature, we observe a transition from a pure QZE in the short time scale to a QZE-QAZE crossover in the long time scale by considering the measurement-induced non-Markovian effect. At finite temperature, we exploit that the thermal fluctuation suppresses the decay of the survival probability in the short time scale, whereas it enhances the decay in the long time scale.