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A Comparison of Quantum Discord and Entanglement in a Micromaser-Type System

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Abstract

The correlations dynamics of a pair of two-level atoms going though a cavity one after another are investigated. It is shown that initial entanglement of two atoms has interesting subsequent time evolution, including the so-called entanglement sudden death as expected, and initial uncorrelated states become entanglement and nonzero quantum discord in the same time. In particular, it is found that the curves of time evolution of entanglement and quantum discord are nearly same profile. It may lead to a better understanding of relations between entanglement and quantum discord.

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Authors and Affiliations

  1. Department of Physics, School of Science, Tianjin Key Laboratory of Advanced Technology of Electrical Engineering and Energy, Tianjin Polytechnic University, Tianjin, 300387, China

    Xue-Qun Yan & Kun Meng

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  1. Xue-Qun Yan
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  2. Kun Meng
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Correspondence to Xue-Qun Yan.

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Yan, XQ., Meng, K. A Comparison of Quantum Discord and Entanglement in a Micromaser-Type System. Int J Theor Phys 53, 2746–2752 (2014). https://doi.org/10.1007/s10773-014-2070-4

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  • DOI: https://doi.org/10.1007/s10773-014-2070-4

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