Entanglement between isolated two-level atom and Jaynes-Cummings atom in a cavity with nonlinearity

Abstract

In this talk, we consider the dynamics of two dipole-coupled two-level atoms (qubits). The first of them is trapped in a lossless cavity with Kerr media and resonantly interacts with the thermal cavity field. The second qubit is outside the cavity. We obtain the exact solution of the model under consideration. For that we used so-called dressed-state representation. On its basis we calculate the negativity as a measure of qubit-qubit entanglement. It is shown that, under certain conditions, the Kerr nonlinearity and direct dipole-dipole interaction of qubits can enhance the maximum degree of qubit-qubit entanglement induced by the thermal field and can eliminate the sudden death of entanglement.

Speaker

Eugene K. Bashkirov
Samara Universitet, Samara
Russia

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