Geometric measure of quantum discord in non-Markovian environments
Geometric measure of quantum discord in non-Markovian environments
复制标题
DOI：
10.1016/j.optcom.2010.07.023
复制
发表时间：
2010-12
影响因子：
2.4
通讯作者：
Ferdi Altintas
中科院分区：
文献类型：
--
作者：
Ferdi Altintas
我们研究了两个非相互作用量子位之间量子不和谐的几何测量动力学，每个量子位都沉浸在自己的非马尔可夫环境中，其谱分布代表非谐振高 Q 腔内的电磁场。我们将量子不和谐的几何测量动力学与初始类沃纳态的量子不和谐进行了比较，并得出了三个重要的发现。首先，当量子不和谐的动力学在某些时间点瞬时消失时，量子不和谐的几何测量也会消失，但不是立即消失。其次，量子不和谐几何测度衰减率的突然变化可能并不意味着量子不和谐动力学衰减率的突然变化。第三，当同时满足失谐条件和非马尔可夫条件时，量子不和谐和量子不和谐的几何测度都存在很长一段时间的保存。
We study the dynamics of geometric measure of quantum discord between two non-interacting qubits each immersed in its own non-Markovian environment with a spectal distribution representing the electromagnetic field inside off-resonant high-Q cavity. We compared the dynamics of geometric measure of quantum discord with quantum discord for an initial Werner-like state and conclude three important findings. First, when there is an instantaneous disappearance in the dynamics of quantum discord at some timepoints, there is a disappearance in geometric measure of quantum discord, but not instantly. Second, the sudden change in the decay rate of geometric measure of quantum discord might not imply the sudden change in the decay rate of the dynamics of quantum discord. Third, there is a preservation for a long time in both quantum discord and geometric measure of quantum discord when the detuning and non-Markovian conditions are simultaneously satisfied.