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Journal of Qinzhou University

Preparation of Entangled Coherent State of Cavity Field

Cai Zhao-yun

Published Jan 1, 2006• 0 citations
OpenAlex

Abstract

The triple-mode cavity field entangled coherent state can be prepared by using Jaynes-Cumminges model of interacted heavy detuning between single-mode cavity field and two-level atom.

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This paper considers a two-level atom interacting with two cavity modes with equal frequencies. Applying a unitary transformation, the system reduces to the analytically solvable Jaynes–Cummings model. For some particular field states, coherent and squeezed states, the transformation between the two bare bases, related by the unitary transformation, becomes particularly simple. It is shown how to generate (the highly non-classical) entangled coherent states of the two modes, both in the zero and large detuning cases. An advantage of the zero detuning case is that the preparation is deterministic and no atomic measurement is needed. For the large detuning situation, a measurement is required, leaving the field in either of two orthogonal entangled coherent states.