Non-Markovian dynamics of a qubit
Non-Markovian dynamics of a qubit
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DOI：
10.1103/physreva.73.012111
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发表时间：
2006-01-01
影响因子：
2.9
通讯作者：
Petruccione, F
中科院分区：
文献类型：
--
作者：
Maniscalco, S;Petruccione, F
在本文中，我们研究了非马尔可夫动力学的量子比特通过比较两个广义主方程的记忆。在热浴的情况下，我们导出了最近提出的后马尔可夫主方程的解[A。Shabani和D. A. Lidar，Phys.Rev.A71，020101（R）（2005）]，并且我们研究了指数衰减的存储器内核的动力学。我们比较了后马尔可夫主方程的解决方案与典型的记忆核主方程的解决方案。我们的研究结果导致一个新的物理解释的水库相关函数，并带来光的可用性与内存的系统考虑的主方程的限制。
In this paper we investigate the non-Markovian dynamics of a qubit by comparing two generalized master equations with memory. In the case of a thermal bath, we derive the solution of the recently proposed post-Markovian master equation [A. Shabani and D. A. Lidar, Phys. Rev. A 71, 020101(R) (2005)] and we study the dynamics for an exponentially decaying memory kernel. We compare the solution of the post-Markovian master equation with the solution of the typical memory kernel master equation. Our results lead to a new physical interpretation of the reservoir correlation function and bring to light the limits of usability of master equations with memory for the system under consideration.