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Pishbin N.,Plasma Science and Technology Research Institute | Dini F.,Amirkabir University of Technology | Alinejad N.,Plasma Science and Technology Research Institute
Journal of Fusion Energy | Year: 2012

Calculations of decay rates of an excited atom embedded in a dispersive and dissipative plasma medium are presented in this paper. The usual expression for decay rate of an initially excited atom in dipole approximation is given by Fermi's golden rule. The electric field correlation function is related to the imaginary part of the potential Green's function along with the fluctuation of dissipation theorem and Kubo's formula. Using the Green's function technique offers possibilities of closed function representations. It is applicable to evaluate the decay rate of an excited atom that allows us to understand the particular structure of the vacuum state of the electromagnetic field. In this paper, the decay rate of an excited atom in dispersive and dissipative media is estimated. © Springer Science+Business Media, LLC 2011.


Pishbin N.,Plasma Science and Technology Research Institute | Alinejad N.,Plasma Science and Technology Research Institute
Journal of Fusion Energy | Year: 2012

The effect of magnetic field on the decay rate of an excited atom in a dispersive and dissipative plasma medium is calculated. For this purpose, two particular cases of parallel and perpendicular propagation with respect to the magnetic field is considered for an homogeneous infinitely extended medium. The difference between these two cases is shown in the index of the refraction of the media. For calculating the decay rate, the approach of the Green's function is used. It is applicable to evaluate the decay rate of an excited atom that allows us to understand the particular structure of the vacuum state of the electromagnetic field. © Springer Science+Business Media, LLC 2012.


Alinejad N.,Plasma Science and Technology Research Institute | Pishbin N.,Plasma Science and Technology Research Institute
Advances in Materials Science and Engineering | Year: 2014

Investigation of spontaneous decay of an excited atom in dusty unmagnetized plasma is presented in this paper. The transverse contribution to the decay rate is normally associated with spontaneous emission. The rate of spontaneous emission can be obtained by Fermi's golden rule. In this calculation, the transverse contribution to dielectric permittivity and Green function technique are used. Calculation of the decay rate of atoms is applicable to understand the particular structure of the vacuum state of the electromagnetic field. © 2014 Naser Alinejad and Noushin Pishbin.

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