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Chinese journal of atomic and molecular physics

Higher-order squeezing of atomic dipole in the nonlinear Jaynes-Cummings model

Tian Yong

Published Jan 1, 2001• 0 citations
OpenAlex

Abstract

The time evolution properties of higher order squeezing of atomic dipole and its producing conditions in the nonlinear two photon Jaynes Cummings model are studied. It is shown that the two order and six order quantum fluctuation of the branch part of the atomic dipole chromatic dispersion or absorption can be periodically squeezed in a weak intensity field. The nonlinear correction term, the two photon frequency detuning and thermal noise have a remarkable influence on the squeezing.

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Acta Physica Sinica•Jan 1, 1995•0 citations
The time evolution properties of higher order squeezing of atomic dipole and its producing conditions in the nonlinear two photon Jaynes Cummings model are studied. It is shown that the two order and six order quantum fluctuation of the branch part of the atomic dipole chromatic dispersion or absorption can be periodically squeezed in a weak intensity field. The nonlinear correction term, the two photon frequency detuning and thermal noise have a remarkable influence on the squeezing.
The nonlinear Jaynes-Cummings model is investigated for squeezing and higher-order squeezing produced from the interaction of the model with two coherent modes. Squeezing of the matter operators is also considered. Two-mode squeezing and higher-order two-mode squeezing are investigated for the present model. We found that squeezing produced using the concept of two-mode squeezing is more effective than squeezing produced using the single-mode-squeezing concept. It is shown that squeezing of the field can be enhanced for small n\ifmmode\bar\else\textasciimacron\fi{}=0 and m\ifmmode\bar\else\textasciimacron\fi{}=0 when the atom is initially in a coherent superposition state.
By means or investigating the time evolution of the atomic dipole squeezing and the field squeezing in the one-photon Jaynes-Cummings model and the nondege-nerate two-photon Jaynes-Cummings model, the relations between atomic dipole squeezing and squeezing in the radiating field are examined. The conditions under which the atom in atomic dipole squeezed state can radiate squeezed light are presented. The properties of the squeezing transformation between atomic dipole quadrature components and field quadrature components are also discussed. And in the atom-field coupling system, the two-photon transtion processes in producing squeezed light are superior to the one-photon transition processes.