Correlations and thermalization in driven cavity arrays

Details Correlations and thermalization in driven cavity arrays Correlations and thermalization in driven cavity arrays

2011-04-18

arxiv.org/abs/1104.3422v1

Physics

Quantum Physics

Proceedings of International Symposium on 75 Years of Quantum Entanglement

Scientific paper

We show that long-distance steady-state quantum correlations (entanglement) between pairs of cavity-atom systems in an array of lossy and driven coupled resonators can be established and controlled. The maximal of entanglement for any pair is achieved when their corresponding direct coupling is much smaller than their individual couplings to the third party. This effect is reminiscent of the coherent trapping of the $\Lambda-$type three-level atoms using two classical coherent fields. Different geometries for coherent control are considered. For finite temperature, the steady state of the coupled lossy atom-cavity arrays with driving fields is in general not a thermal state. Using an appropriate distance measure for quantum states, we find that the change rate of the degree of thermalization with respect to the driving strength is consistent with the entanglement of the system.

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