Coherence effects in the interaction of radiation with atoms

Daniel F. Walls, Gerard J Milburn

J. Cooper, Derek N. Stacey

The Doppler effect reduces the radiative interaction between identical atoms so that only those for which k. Delta v <or approximately= pi Gamma can couple coherently (where Delta v is the relative velocity, k=2 pi / lambda and Gamma is the lifetime of the isolated atom). The authors conclude that this coherent interaction cannot explain the 'extrapolation anomaly' of resonance broadening.

Xiao-shen Li, Yue-nan Peng

The quantum-statistical model for a three-level atom interacting with two radiation fields is studied. The mean atomic occupations and photon numbers are obtained under different initial conditions of one coherent field and one chaotic field or both chaotic or coherent fields, with the atom in upper or lower states. Through numerical summation, it is shown that the effects of coherent sources and chaotic sources are different even for low intensities. Meanwhile the effects of detuning on this interaction are discussed.

Daniel F. Walls, Gerard J Milburn

Vyacheslav I. Yukalov

Interplay between the effects of coherent radiation and localization of light is analysed. A system of two-level atoms is placed in a medium interacting with electromagnetic field. The matter-light interaction can result in the appearance of a band gap in the spectrum of polariton states. If an atom with a resonance frequency inside the gap is incorporated into such a medium, the atomic spontaneous emission is suppressed, which is termed the localization of light. However, a system of resonance atoms inside the gap can radiate due to their coherent interactions. The peculiarity of the coherent radiation by a system of atoms, under the localization of light for a single atom, is studied.

A. D. Gazazyan