School of Physics & Electronics Engineering, Fuyang Normal University, Fuyang, 236037, China.
Research Centre of Quantum Information Technology, Fuyang Normal University, Fuyang, 236037, China.
Sci Rep. 2017 Aug 17;7(1):8625. doi: 10.1038/s41598-017-07235-3.
In this work, the dynamics of quantum correlation (QC) in terms of geometric discord and its transfer coupled with dissipative reservoirs are investigated. Taken two canonical cases where the qubits of interest are initially prepared in extended Werner-like state and W-like states into account, we specifically reveal the dynamical behaviors of the geometric discord as each qubit locally interacts with its surrounding infinite degree-of-freedom reservoir. In the scenarios, the short-term and long-term dynamics of the geometric discord for the qubit- and reservoir-subsystem as well as its transfers between them are observed detailedly. It turns out that the geometric discord of qubit-subsystem decays asymptotically to zero while the counterpart of reservoir-subsystem can revive from time t = 0 to steady value, which sheds light on a transfer of the discord from the qubit-subsystem to the corresponding reservoir-subsystem.
在这项工作中，我们研究了量子相关（QC）的动力学，包括几何失谐及其与耗散储层的传递。考虑到两个典型的情况，即感兴趣的量子位最初处于扩展的 Werner 态和 W 态，我们特别揭示了几何失谐的动力学行为，因为每个量子位都与其周围的无限自由度储层局部相互作用。在这些情况下，详细观察了量子位子系统和储层子系统的几何失谐的短期和长期动力学及其之间的转移。结果表明，量子位子系统的几何失谐渐近地衰减到零，而储层子系统的对应物可以从时间 t = 0 恢复到稳定值，这表明失谐从量子位子系统转移到相应的储层子系统。
