Quantum Correlations Between Identical and Unidentical Atoms in a Dissipative Environment

Details Quantum Correlations Between Identical and Unidentical Atoms in a Dissipative Environment Quantum Correlations Between Identical and Unidentical Atoms in a Dissipative Environment

2011-05-11

arxiv.org/abs/1105.2222v3

J. Phys. B: At. Mol. Opt. Phys. 44 (2011) 125501

Physics

Quantum Physics

Scientific paper

10.1088/0953-4075/44/12/125501

We have studied the dynamics of quantum correlations such as entanglement, Bell-nonlocality and quantum discord between identical as well as unidentical atoms interacting with a single-mode cavity field and subject to cavity decay. The effect of single atom detuning, cavity decay rate and initial preparation of the atoms on the corresponding correlation measures have been investigated. It is found that even under strong dissipation, time evolution can create high quantum discord while entanglement and Bell nonlocality stay zero for an initially separable state. Quantum discord increases while entanglement decreases in a certain time period under dissipation for the initial state that both atoms are in the excited state if the qubits are identical. For some type of initial states, cavity decay is shown to drive the system to a stationary state with high entanglement and quantum discord.

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