Entropy and entanglement in the mixed state for a dispersive JC model in a phase-damped cavity |
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Authors: | A-SF Obada A-BA Mohamed |
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Institution: | a Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt b Faculty of Science, Assiut University, Assiut, Egypt |
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Abstract: | Temporal evolution is studied for total entropy, the entropy difference and the sum of negative eigenvalues of the partially transposed density matrix as quantitative entanglement measurements for JC model in a phase-damped cavity in the dispersive approximation. The cavity field is assumed to be coupled to a reservoir with a phase-damping coupling. The case of a statistical mixture (SM) of coherent states is considered as initial field state. The effects of cavity phase damping on the entanglement between the field and the atom are studied. |
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