Nonlinear coherent state of an exciton in a wide quantum dot

Abstract

In this paper, we derive the dynamical algebra of a particle confined in an infinite spherical well using the f-deformed oscillator approach. We consider an exciton with definite angular momentum in a wide quantum dot interacting with two laser beams. We show that under the weak confinement condition, and quantization of the centre-of-mass motion of exciton, its stationary state can be considered as a special kind of nonlinear coherent states which exhibits the quadrature squeezing. © 2008 IOP Publishing Ltd.