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Thermal entanglement in Tavis-Cummings models with Kerr media

Eugene K. Bashkirov, Samara National Research University, Samara, Russia

Abstract

In this paper, we investigated the entanglement dynamics between two superconducting qubits interacting with a thermal one-mode field of lossless cavity with the Kerr media. We obtained the exact solution for time-dependent density matrix and calculated on its basis the qubi-qubit entanglement parameter -- negativity. The results show that Kerr nonlinearity greatly affected the entanglement behaviour. More interestingly, that initial qubits coherence greatly enhances the degree of entanglement in the presence of the Kerr medium.

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Eugene K. Bashkirov
Samara National
Russia

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