Negativity as Entanglement Degree of the Jaynes-Cummings Model

Details Negativity as Entanglement Degree of the Jaynes-Cummings Model Negativity as Entanglement Degree of the Jaynes-Cummings Model

2007-02-11

arxiv.org/abs/quant-ph/0702101v2

Physica Scripta, 75 (2007) 608-614

Physics

Quantum Physics

10 pages, 5 figures

Scientific paper

In this paper, by using the notion of negativity, we study the degree of entanglement of a two-level atom interacting with a quantized radiation field, described by the Jaynes-Cummings model (JCM). We suppose that initially the field is in a pure state and the atom is in a general mixed state. In this case the negativity fully captures the entanglement of the JCM. We investigate the case for that the initial state of the field is a coherent state. The influences of the detuning on the degree of entanglement is also examined.

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