Exact decoherence-free state of two distant quantum systems in a non-Markovian environment
Exact decoherence-free state of two distant quantum systems in a non-Markovian environment
复制标题
非马尔可夫环境中两个遥远量子系统的精确无退相干状态
DOI：
10.1103/physreva.93.062122
复制
发表时间：
2016-01
影响因子：
2.9
通讯作者：
An Jun-Hong
中科院分区：
文献类型：
--
作者：
Chen Chong;Yang Chun-Jie;An Jun-Hong
Decoherence-free-state (DFS) encoding supplies a useful way to avoid the detrimental influence of the environment on quantum information processing. The DFS was previously well established in either the two subsystems locating at the same spatial position or the dynamics under the Born--Markovian approximation. Here, we investigate the exact DFS of two spatially separated quantum systems consisting of two-level systems or harmonic oscillators coupled to a common non-Markovian zero-temperature bosonic environment. The exact distance-dependent DFS and the explicit criterion for forming the DFS are obtained analytically, which reveals that the DFS can arise only in one-dimensional environment. It is remarkable to further find that the DFS is just the system-reduced state of the famous bound state in the continuum (BIC) of the total system predicted by Wigner and von Neumann. On the one hand our result gives insight into the physical nature of the DFS, and on the other hand it supplies an experimentally accessible scheme to realize the mathematically curious BIC in the standard quantum optical systems.
DOI：
10.1017/cbo9781139207249.009
发表时间：
2012
期刊：
--
影响因子：
--
作者：
W. Marsden
通讯作者：
W. Marsden
DOI：
10.1007/3-540-44874-8_5
发表时间：
2003-01
期刊：
--
影响因子：
--
作者：
Daniel A. Lidar;K. B. U. O. Toronto;U. California;Berkeley
通讯作者：
Daniel A. Lidar;K. B. U. O. Toronto;U. California;Berkeley