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Ghasemian E, Tavassoly M K. Squeezing of three-level atom-laser and field photons in the presence of Kerr medium in the electromagnetically induced transparency regime. ICOP & ICPET _ INPC _ ICOFS 2018; 24 :661-664
URL: http://opsi.ir/article-1-1484-en.html
URL: http://opsi.ir/article-1-1484-en.html
1- Atomic and Molecular Group, Faculty of Physics, Yazd University
Abstract: (2597 Views)
In this paper we investigate the output of an atom-laser which consists of an ensemble of three-level atoms in Bose Einstein condensate (BEC) state interacting with two quantized and classical laser fields in the presence of a Kerr medium. Under electromagnetically induced transparency (EIT) regime and using the adiabatically elimination process, we represent the Hamiltonian of the system in terms of angular momentum operators and then derive its state vector explicitly with the help of the Dicke model. The results show that nonlinear interactions in the system, i.e. "interatom collisions" and "Kerr medium" lead to squeezed atoms and photons. In this respect, the squeezing values can be controlled by adjusting the strength of interatom collisions, Kerr parameter as well as other involved parameters in the considered model. Also, collapse-revival phenomenon as a pure quantum feature can be observed in the behavior of atomic squeezing.
Keywords: Atom-laser, Bose-Einstein condensate, atomic population inversion, atomic and field squeezing.
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