Europhysics Letters (EPL)
Density matrix approach of the excitation on coherent states of the pseudoharmonic oscillator
Dušan Popov, Nicolina Pop, Ioan Luminosu, Viorel Chiritoiu
Abstract
We have examined the excitation on coherent states of the pseudoharmonic oscillator which are obtained by repeated action of the raising operator on the usual coherent states. By using the density matrix approach, we have examined some interesting properties (including the nonclassicality) of these states, both in pure and also in mixed (thermal) cases.