Quantum correlation dynamics of three non-coupled two-level atoms in different reservoirs |
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Authors: | Wang Xiao-Yun Ding Bang-Fu Zhao He-Ping |
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Affiliation: | College of Physics and Mechanical & Electrical Engineering, Jishou University, Jishou 416000, China |
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Abstract: | Time evolution dynamics of three non-coupled two-level atoms independently interacting with their reservoirs is solved exactly by considering a damping Lorentzian spectral density. For three atoms initially prepared in Greenberger-Horne-Zeilinger-type state, quantum correlation dynamics in Markovian reservoir is compared with that in non-Markovian reservoir. By increasing detuning quantity in non-Markovian reservoir, three-atom correlation dynamics measured by negative eigenvalue presents a trapping phenomenon which provides long-time quantum entanglement. Then we compare the correlation dynamics of three atoms with that of two atoms, measured by quantum entanglement and quantum discord for initial robuster-entangled type state. The result further confirms that quantum discord is indeed different from quantum entanglement in identifying quantum correlation of many bodies. |
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Keywords: | quantum correlation dynamics Lorentzian spectral density Markovian and non-Markovian reservoirs |
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