FROZEN DISCORD IN NON-MARKOVIAN DEPHASING CHANNELS
FROZEN DISCORD IN NON-MARKOVIAN DEPHASING CHANNELS
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DOI：
10.1142/s021974991100754x
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发表时间：
2010-06
影响因子：
1.2
通讯作者：
L. Mazzola;L. Mazzola;J. Piilo;Sabrina Maniscalco;Sabrina Maniscalco
中科院分区：
文献类型：
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作者：
L. Mazzola;L. Mazzola;J. Piilo;Sabrina Maniscalco;Sabrina Maniscalco
我们研究了局部有色噪声相移通道下两个量子位系统中量子和经典相关性的动力学。单个量子位与其自身环境交互的时间演化由内存内核非马尔可夫主方程描述。与白噪声马尔可夫情况相比，非马尔可夫储层的记忆效应在量子和经典相关性的动力学中引入了新特征。根据初始状态的几何形状，系统可以表现出冻结的不和谐以及经典和量子退相干之间的多个突然转变[L. Mazzola、J. Piilo 和 S. Maniscalco，物理学家。莱特牧师。 104（2010）200401]。我们根据所研究的状态与其在系统希尔伯特空间中最接近的经典状态的距离来对这些现象进行几何解释。
We investigate the dynamics of quantum and classical correlations in a system of two qubits under local colored-noise dephasing channels. The time evolution of a single qubit interacting with its own environment is described by a memory kernel non-Markovian master equation. The memory effects of the non-Markovian reservoirs introduce new features in the dynamics of quantum and classical correlations compared to the white noise Markovian case. Depending on the geometry of the initial state, the system can exhibit frozen discord and multiple sudden transitions between classical and quantum decoherence [L. Mazzola, J. Piilo and S. Maniscalco, Phys. Rev. Lett. 104 (2010) 200401]. We provide a geometric interpretation of those phenomena in terms of the distance of the state under investigation to its closest classical state in the Hilbert space of the system.