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Acta Physica Sinica

Entanglement properties in the system of atoms interacting with three coupled cavities which are in weak coherent states

LU Dao-ming

Published Jan 1, 2013• 1 citation
Publisher

Abstract

We study the entanglement dynamics of the system comprising three two-level atoms resonantly interacting with three coupled cavities which are in weak coherent states initially. The atom-atom entanglement and cavity-cavity entanglement are investigated. The influences of coupling constant between cavities and intensity of the cavity field on entanglement properties are discussed. The results obtained using the numerical method show that atom-atom entanglement and cavity-cavity entanglement are both strengthened with the increase of intensity of the cavity field; on the other hand, atom-atom entanglement is weakened and the entanglement between cavity A and cavity B is strengthened with the increase of the coupling constant between cavities, and the entanglement between cavity B and cavity C has a nonlinear relation with the increase of the cavity-cavity coupling coefficient. These results are different from those in the case that cavity field is in vacuum state initially.

DOI
10.7498/aps.62.030302

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We study the entanglement dynamics of the system composed of a Λ-type atom and a V-type atom resonantly interacting with two coupled cavities. The evolution of the state vector of the system is given. We investigate the evolutions of atom-atom entanglement, cavity-cavity entanglement, and atom-cavity entanglement by Negativity. The influences of cavity-cavity coupling coefficient on the entanglements are discussed. The results obtained by the numerical method show that the atom-atom entanglement is strengthened and the cavity-cavity entanglement is weakened with the increase of the cavity-cavity coupling coefficient.
We study atomic dipole squeezing of the system comprising three two-level atoms resonantly interacting with three coupled cavities which are in weak coherent states initially.The atomic dipole squeezing is investigated.The influences of coupling constant between cavities and intensity of the cavity field on atomic dipole squeezing are discussed.The results obtained using the numerical method show that atomic dipole squeezing is weakened with the increase of the coupling constant between the cavities.On the other hand,atomic dipole squeezing is strengthened with increase of intensity of the cavity field.
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