Fam Le Kien

Squeezing in the multiphoton Jaynes-Cummings model

Abstract Squeezing in the exactly solvable multiphoton Jaynes-Cummings model is examined.

Two-phonon process in a three-level system

Abstract The dynamical behaviour of level filling and occupation numbers of photon modes is examined rigorously. A “quantum expression” for the Rabi frequency is obtained.

Exact results for a model of a three-level atom

Abstract For a three-level atom interacting with two modes of the quantized radiation field the time dependence of transition operators, photon amplitudes, and of operators of level populations and photon numbers is examined rigorously. It is shown that the availability of a mode detuning leads to the splitting of the “soft branch” of frequencies of two-photon Rabi oscillations.

Superradiance allowing for the pumping processes

An exact kinetic equation for a three-level macroscopic system interacting with an electromagnetic field is obtained taking into account the coherent pumping processes. On its basis the collective spontaneous radiation of the system is examined in the markovian limit. The relations between the parameters of the supperadiant pulse and those of the pumping pulse are obtained.

Photon statistics and atomic dynamics in a three-level plus two-mode model

Abstract The relations between photon statistical characteristics and atomic level populations are examined rigorously. The characteristic and photon distribution functions are found.

On the kinetics of Dicke-type systems

An exact hierarchy for the Dicke-type model problems is obtained. On its basis spontaneous-radiation processes are examined.

Collective spontaneous radiation of two atoms in the finite-Q cavity

Abstract The spontaneous collective radiation of two two-level atoms with one-photon transitions in a nonideal cavity is considered. The temporal evolution of mean photon number, radiation rate and atomic population inversion is examined. The possibility of photon statistics change from sub-Poissonian to super-Poissonian is shown.

Time evolution of light squeezing in a Jaynes-Cummings model

Abstract The time evolution of fluctuations in a squeezed single-mode field interacting with a two-level atom initially in a coherent superposition of excited and ground states is treated. The phase dependence is discussed.

Light squeezing in the two-atom one-mode model with multi-photon transitions

Abstract The generation of squeezed states of the cavity radiation field in the two-atom one-mode model with multi-photon transitions is investigated. The time-dependent squeezing factors are calculated. The conditions for optimum squeezing are derived.

Nonclassical Correlation between Light Beams in a Jaynes-Cummings-Type Model System

The appearance of nonclassical correlation between light beams due to the interaction with an atom in a three-level two-mode Jaynes-Cummings-type model is examined.