Acta Photonica Sinica, Volume. 44, Issue 11, 1127001(2015)
The Quantum Discord in the System of Atoms Interacting with Coupled Cavities via a Two-photon Hopping Interaction
The cavity each imprisons one two-level atom,the atom has a resonant interaction with the cavities,and the cavities also interact with each other. Considering these,the geometrical quantum discord was used to measure quantum correlation in quantum systems. The geometrical quantum discord between the atoms,the cavities,and also between the atoms and the cavities were investigated. By using the numerical method,the evolution curves of the geometrical quantum discord were given,and the influences on the geometrical quantum discord with the changing coupling constant between the cavities were discussed. The results obtained show that the geometrical quantum discord between atoms is strengthened,but the geometrical quantum discord between cavities or between the atoms and the cavities are all weakened with the increasing of the coupling constant between cavities.
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QIU Chang-dong, LU Dao-ming. The Quantum Discord in the System of Atoms Interacting with Coupled Cavities via a Two-photon Hopping Interaction[J]. Acta Photonica Sinica, 2015, 44(11): 1127001
Received: Jun. 30, 2015
Accepted: --
Published Online: Dec. 18, 2015
The Author Email: Chang-dong QIU (qiucd_321@126.com)