Physics – Quantum Physics
Scientific paper
2000-07-24
Laser Physics 11 (4), 449-454 (2001)
Physics
Quantum Physics
12 pages, LaTeX, talk at the 9th International Workshop on Laser Physics
Scientific paper
Starting from the first principles of nonrelativistic QED we have developed the quantum theory of the interaction of a two-component ultracold atomic ensemble with the electromagnetic field of vacuum and laser photons. The main attention has been paid to the consistent consideration of dynamical dipole-dipole interactions in the radiation field. Taking into account local-field effects we have derived the system of Maxwell-Bloch equations. Optical properties of the two-component Bose gas are investigated. It is shown that the refractive index of the gas is given by the Maxwell-Garnett formula. All equations which are used up to now for the description of the behavior of an ultracold atomic ensemble in a radiation field can be obtained from our general system of equations in the low-density limit. Raman-Nath diffraction of the two-component atomic beam is investigated on the basis of our general system of equations.
Audretsch J"urgen
Krutitsky Konstantin V.
Marzlin Kar Peter
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