Wave packet dynamics of entangled two-mode states

Details Wave packet dynamics of entangled two-mode states Wave packet dynamics of entangled two-mode states

2006-03-02

arxiv.org/abs/quant-ph/0603020v1

J. Phys. B: At. Mol. Opt. Phys., 39, 3345 (2006)

Physics

Quantum Physics

18 pages, 7 figures

Scientific paper

10.1088/0953-4075/39/16/017

We consider a model Hamiltonian describing the interaction of a single-mode radiation field with the atoms of a nonlinear medium, and study the dynamics of entanglement for specific non-entangled initial states of interest: namely, those in which the field mode is initially in a Fock state, a coherent state, or a photon-added coherent state. The counterparts of near-revivals and fractional revivals are shown to be clearly identifiable in the entropy of entanglement. The ``overlap fidelity'' of the system is another such indicator, and its behaviour corroborates that of the entropy of entanglement in the vicinity of near-revivals. The expectation values and higher moments of suitable quadrature variables are also examined, with reference to possible squeezing and higher-order squeezing.

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