Entanglement in the Tavis-Cummings model with Izing interaction

Abstract

In this talk, we investigated the dynamics of entanglement of two and three qubits interacting non-resonantly with the thermal field of a one-mode lossless resonator, taking into account the Ising-type direct interaction between qubits. Based on the exact solution negativitis for pairs of qubits, was found. It was shown that for the resonance model and separable initial states of qubits, the direct interaction of qubits leads to a significant increase in the maximum degree of their entanglement. For the entangled initial states of the qubits, the direct interaction was found to lead to the vanishing of the effect of the sudden death of entanglement in the case of a resonant qubit-field interaction and, conversely, to an increase in this effect for a nonresonant interaction.

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Eugene K. Bashkirov
Samara University
Russia

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