S J Akhtarshenas and M Farsi 2007 Phys. Scr. 75 608 doi:10.1088/0031-8949/75/5/003
S J Akhtarshenas and M Farsi
Show affiliationsIn 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 that the initial state of the field is a coherent state. The influences of the detuning on the degree of entanglement are also examined.
Issue 5 (May 2007)
Received 14 November 2006, accepted for publication 17 January 2007
Published 8 March 2007
S J Akhtarshenas and M Farsi 2007 Phys. Scr. 75 608
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