Nonclassicality and Decoherence of Photon-added Thermo-invariant Coherent State |
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Authors: | Ping Hu and Jian He |
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Institution: | 1.Department of Physics,Nanchang University,Nanchang,China;2.Jiangxi Tourism & Commerce College,Nanchang,China |
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Abstract: | By introducing a kind of new quantum state—Photon-added thermo invariant coherent state (PATCS), we discuss its nonclassicality
in terms of the negativity of Wigner function (WF) after deriving its analytical expression. It is found that the Wigner function
is related to Lagurre-Gaussian function. We then study the effect of decoherence (a thermal environment) on the PATCS according
to its WF (also related to Lagurre-Gaussian function). It is shown that it is not possible for WF to present the negative
region when the decay time
$\kappa t>\frac{1}{2}\ln \frac{2\bar{n}+2}{2\bar{n}+1}$\kappa t>\frac{1}{2}\ln \frac{2\bar{n}+2}{2\bar{n}+1}
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Keywords: | |
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