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Acta Physica Sinica

ATOMIC SQUEEZING EFFECTS IN THE TWO-PHOTON JAYNES-CUMMINGS MODEL

Eng J

Published Jan 1, 1989• 0 citations
OpenAlex

Abstract

The laws with which the state vector of the two-photon Jaynes-Cummings model varies with the time are studies by means of the time-evolution operator. The statistical properties of atoms are discussed. The atomic squeezing effects are revealed.

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International Journal of Modern Physics B•Nov 10, 1992•13 citations
The quatum statistical properties of two-photon radiation from two-level atomic system are investigated by using complete set in the nth subspace of generalized Jaynes-Cummings hamiltonian, and the general expression for field variance is obtained. The conditions for optimum squeezing as well as the optimum squeezed quantity are found out for an arbitrary initial state, and the time evolution of the optimum squeezed state is then analysed. As an example, the squeezing in an initial state with bare atomic system in thermal equilibrium is discussed, which demonstrates the dependence of squeezing on several parameters, such as, temperature, detuning, coupling strength. The conditions for squeezing are given analytically and numerically. Finally, the physical picture of the squeezing is pointed out.
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.