Nonclassicality of single quantum excitation of a thermal field in thermal environments

Details Nonclassicality of single quantum excitation of a thermal field in thermal environments Nonclassicality of single quantum excitation of a thermal field in thermal environments

2008-05-28

arxiv.org/abs/0805.4252v1

Phys. Lett. A 372, 6875 (2008)

Physics

Quantum Physics

4 pages, 2 figures, revtex4, Welcome any comments

Scientific paper

10.1016/j.physleta.2008.10.016

The nonclassicality of single photon-added thermal states in the thermal channel is investigated by exploring the volume of the negative part of the Wigner function. The Wigner functions become positive when the decay time exceeds a threshold value $\gamma{t}_c$, which only depends on the effective temperature or mean thermal photon number of the thermal channel, but not depends on the effective temperature of the initial thermal state. This phenomenon is similar with the case of single quantum excitation of classical coherent states in thermal channel. Furthermore, we firstly demonstrate $\gamma{t}_c$ is the same for arbitrary pure or mixed nonclassical optical fields with zero population in vacuum state. PACS numbers: 42.50.Dv, 03.65.Yz, 05.40.Ca

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