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Communications in Theoretical Physics

Information Entropy Squeezing for a Atom in Mode-Mode Competition System

Qin Wu, Mao-Fa Fang, Shaoxin Li, Li Ying, Yao-Hua Hu

Published Dec 1, 2008• 2 citations
Publisher

Abstract

The entropy squeezing properties for a two-level atom interacting with a two-mode field via two different competing transitions are investigated from a quantum information point of view. The influences of the initial state of the system and the relative coupling strength between the atom and the field on the atomic information entropy squeezing are discussed. Our results show that the squeezed direction and the frequency of the information entropy squeezing can be controlled by choosing the phase of the atom dipole and the relative competing strength of atom-field, respectively. We find that, under the same condition, no atomic variance squeezing is predicted from the HUR while optimal entropy squeezing is obtained from the EUR, so the quantum information entropy is a remarkable precision measure for the atomic squeezing in the considered system.

DOI
10.1088/0253-6102/50/6/34

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The atomic entropy squeezing in Raman transition is studied by means of quantum information entropy theory. The influences of the initial parameters of the system on the atomic information entropy squeezing are presented. It is shown that the squeezed component number, depth and squeezed direction of the information entropy squeezing can be controlled by choosing atomic distribution angle, the relative phase between the two-mode field and the different of the average photon number of the two field modes, respectively. It is also shown that quantum information entropy is a remarkable precision measure for the atomic squeezing.
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