摘要
量和古典关联的 non-Markovian decoherence 是当二 qubits 不均匀地受到小点时,获得的经分解扭动隧道和阶段扭动隧道。为起始的混合状态的一个班,量关联与古典关联同时地由量不一致腐烂确定了。量和古典关联的腐烂的率突然在典型时间改变的发现被距离身体上从量状态解释到最近古典的状态。在大时间间隔,量关联比古典关联大。量和古典关联能经由描绘环境记忆效果的核在时间的一个更长的时期上被保存。
The non-Markovian decoherence of quantum and classical correlations is analytically obtained when two qubits are asymmetrically subjected to the bit flip channel and phase flip channel. For one class of initial mixed states, quantum correlations quantified by quantum discord decay synchronously with classical correlations. The discovery that the decaying rates of quantum and classical correlations suddenly change at the characteristic time is physically interpreted by the distance from quantum state to the closest classical states. In a large time interval, quantum correlations are greater than classical correlations. The quantum and classical correlations can be preserved over a longer period of time via the kernel characterizing the environment memory effects.
基金
Supported by the Research Program of Natural Science for Colleges and Universities in Jiangsu Province under Grant No.09KJB140009
the National Natural Science Foundation under Grant No.10904104