Quantum correlations between identical and unidentical atoms in a dissipative environment
Quantum correlations between identical and unidentical atoms in a dissipative environment
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DOI：
10.1088/0953-4075/44/12/125501
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发表时间：
2011-05
期刊：
影响因子：
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通讯作者：
Ferdi Altintas;R. Eryigit
中科院分区：
文献类型：
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作者：
Ferdi Altintas;R. Eryigit
我们研究了量子关联的动力学，例如纠缠、贝尔非定域性以及与单模腔场相互作用并受到腔衰变的相同和不同原子之间的量子不和谐。研究了单原子失谐、空腔衰减率和原子初始制备对相应相关性测量的影响。研究发现，即使在强耗散的情况下，时间演化也会产生高度的量子不和谐，而纠缠和贝尔非定域性对于初始可分离态保持为零。如果量子位相同，则在两个原子都处于激发态的初始状态下，在一定时间段内，量子不一致会增加，而纠缠会减少。对于某些类型的初始状态，空腔衰变被证明可以将系统驱动到具有高纠缠和量子不和谐的静止状态。
We have studied the dynamics of quantum correlations such as entanglement, Bell nonlocality and quantum discord between identical and unidentical atoms interacting with a single-mode cavity field and subject to cavity decay. The effect of single-atom detuning, cavity decay rate and initial preparation of the atoms on the corresponding correlation measures have been investigated. It is found that even under strong dissipation, time evolution can create high quantum discord while entanglement and Bell nonlocality stay zero for an initially separable state. Quantum discord increases while entanglement decreases in a certain time period under dissipation for the initial state that both atoms are in the excited state if the qubits are identical. For some types of initial states, cavity decay is shown to drive the system to a stationary state with high entanglement and quantum discord.