Non-equilibrium entanglement in a driven Dicke model

Details Non-equilibrium entanglement in a driven Dicke model Non-equilibrium entanglement in a driven Dicke model

2009-04-15

arxiv.org/abs/0904.2411v1

Journal of Physics: Conference Series 167 (2009) 012063

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Contribution to the SLAFES XIX. This version to appear in J. Phys.: Conference Series

Scientific paper

10.1088/1742-6596/167/1/012063

We study the entanglement dynamics in the externally-driven single-mode Dicke model in the thermodynamic limit, when the field is in resonance with the atoms. We compute the correlations in the atoms-field ground state by means of the density operator that represents the pure state of the universe and the reduced density operator for the atoms, which results from taking the partial trace over the field coordinates. As a measure of bipartite entanglement, we calculate the linear entropy, from which we analyze the entanglement dynamics. In particular, we found a strong relation between the stability of the dynamical parameters and the reported entanglement.

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