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Ground-State Quantum Discord in Coupled Cavities

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Abstract

We study two coupled cavities system, each of cavity containing a single two-level atom. Quantum entanglemt, quantum discord and quantum phase transition under ground state have been investigated. Atomic excitation number variance has used to characterize the quantum phase transition. We conclude that, in our model, quantum discord have nonzero values while quantum entanglement vanish and quantum discord is a more proper measure to characterize quantum transition.

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Authors and Affiliations

  1. School of Science, Shenyang University of Technology, Shenyang, 110870, People’s Republic of China

    Zhong Ju Liu, Hai Ling Miao, Wei Jiang & Zhi Jie Li

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  1. Zhong Ju Liu
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  2. Hai Ling Miao
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  3. Wei Jiang
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  4. Zhi Jie Li
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Correspondence to Zhong Ju Liu.

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Liu, Z.J., Miao, H.L., Jiang, W. et al. Ground-State Quantum Discord in Coupled Cavities. Int J Theor Phys 54, 821–829 (2015). https://doi.org/10.1007/s10773-014-2275-6

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  • DOI: https://doi.org/10.1007/s10773-014-2275-6

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