

Preprint 28/2013
Dynamics of quantum correlations for atoms in independent single-mode cavity
Li-Li Lan and Shao-Ming Fei
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Submission date: 22. Feb. 2013
Pages: 12
published in: International journal of theoretical physics, 52 (2013) 6, p. 2046-2054
DOI number (of the published article): 10.1007/s10773-012-1453-7
Bibtex
Keywords and phrases: entanglement, Normalized geometric discord, Double J-C model
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Abstract:
We investigate the dynamics of two identical atoms resonantly coupled to independent single-mode cavity in zero
detuning without rotating wave approximation (RWA). It is shown that for two atoms initially
in the ground state, the entanglement (concurrence) and the normalized geometric measure of quantum discord (NGMQD) display similar behavior. There is no sudden death and sudden birth. And the
entanglement is always larger than NGMQD in this case. For two atoms initially in excited state, one can see the novel entanglement sudden death (ESD) and sudden birth (ESB) phenomena. The entanglement is not always greater than
the NGMQD in this case. Consequently, there is no simple dominance relation between the entanglement and the NGMQD.