OFF-RESONANCE LIGHT-SCATTERING FROM LOW-TEMPERATURE BOSE AND FERMI GASES

被引:114
作者
JAVANAINEN, J
RUOSTEKOSKI, J
机构
[1] Department of Physics, University of Connecticut, Storrs
来源
PHYSICAL REVIEW A | 1995年 / 52卷 / 04期
关键词
D O I
10.1103/PhysRevA.52.3033
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We study interactions of light with a sample of two-level atoms, with full inclusion of angular momentum degeneracy, at temperatures and densities such that the quantum statistics of the atoms may have an effect. Coupled propagation equations are given for light and matter fields, and plausible general simplifications are enumerated. In particular, the motion of the atoms during the excited-state lifetime may often be ignored. The propagation equations of light and matter fields are decoupled within the assumption that the detuning of the driving light from atomic resonance is large, and the spectrum of scattered light is studied for ideal Bose and Fermi gases. In addition to the expected image of the velocity distribution, the spectra contain qualitatively distinct features that depend on the statistics of the atoms. This is because for bosons (fermions), those scattering events in which an atom recoils to an already occupied state are enhanced (inhibited).
引用
收藏
页码:3033 / 3046
页数:14
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