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arXiv 1105.2222quant-ph
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耗散环境中全同与非全同原子间的量子关联

Quantum Correlations Between Identical and Unidentical Atoms in a Dissipative Environment

Ferdi Altintas, Resul Eryigit

摘要:

研究了单模腔场与全同和非全同原子相互作用系统中的纠缠、Bell非定域性和量子失谐等量子关联动力学。研究了单原子失谐量、腔场衰减率和原子初始制备对关联测度的影响。研究发现,即使在强耗散下,时间演化也能产生高的量子不和谐,而纠缠和Bell非定域性对于初始可分态保持为零。当两个原子都处于激发态时,当两个原子的量子比特相同时,在一定的时间内,当两个原子处于耗散状态时,量子不和谐增大,纠缠减小。对于某些类型的初始状态,腔衰减被证明是驱动系统到一个稳定的状态与高纠缠和量子不和谐。

英文摘要:

We have studied the dynamics of quantum correlations such as entanglement, Bell-nonlocality and quantum discord between identical as well as 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 type of initial states, cavity decay is shown to drive the system to a stationary state with high entanglement and quantum discord.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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