HIGHER ORDER ELECTROMAGNETIC INTERACTIONS

Jan-Markus Schwindt

Federica Cattani, Arkady V. Kim, M. Lisak +1 more

A review of models describing the interactions of ultra-cold atoms and laser light is given. Both semi-classical and fully quantum models are presented with particular attention given to the introduction of local field effects. Some possible effects of self-localization and guiding, consequences of such interactions, are discussed.

Anirban Pathak

Interaction of intense laser beam with an inversion symmetric third order nonlinear medium is modeled as a quartic anharmonic oscillator. A first order operator solution of the model Hamiltonian is used to study the possibilities of generation of higher order nonclassical states. It is found that the higher order squeezed and higher order antibunched states can be produced by this interaction. It is also shown that the higher order nonclassical states may appear separately, i.e. a higher order antibunched state is not essentially higher order squeezed state and vice versa.

E. Wolf

Abstract : The report summarizes researches concerned with theoretical studies of coherence effects in electromagnetic fields, with special reference to the electromangetic range of the spectrum. Various properties of fluctuating fields were investigated and second and higher order coherence effects were analyzed. Relation between the classical and quantum theory of coherence was also considered. A degree of coherence of arbitrary order was introduced which has some advantages over that introduced earlier by other authors. Further, diagonal coherent state representation of quantum operators was studied. Some related investigations in statistical mechanics, and in diffraction theory of the electromagnetic field were also carried out. (Author)