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MiS Preprint
28/2013

Dynamics of quantum correlations for atoms in independent single-mode cavity

Li-Li Lan and Shao-Ming Fei

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.

Received:
Feb 22, 2013
Published:
Feb 26, 2013
Keywords:
entanglement, Normalized geometric discord, Double J-C model

Related publications

inJournal
2013 Repository Open Access
Li-Li Lan and Shao-Ming Fei

Dynamics of quantum correlations for atoms in independent single-mode cavity

In: International journal of theoretical physics, 52 (2013) 6, pp. 2046-2054