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Updated: May 10, 2026
11:03
An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
Light-wave mixing and scattering with quantum gases.
L Deng1, Chengjie Zhu, E W Hagley
1National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
Physical Review Letters
|June 11, 2013
Summary
We developed a theory for light-wave mixing in quantum gases, revealing stimulated Raman or hyper-Raman processes. Collective atomic recoil motion is key, with enhanced backward scattering in Bose-Einstein condensates.
Area of Science:
- Atomic, Molecular, and Optical Physics
- Quantum Gases
- Condensed Matter Theory
Background:
- Light-wave mixing and scattering are fundamental optical processes.
- Quantum gases exhibit unique collective excitations.
- Collective atomic recoil motion plays a crucial role in light-matter interactions.
Purpose of the Study:
- To present a theoretical framework for light-wave mixing and scattering in single-component quantum gases.
- To identify the nature of optical processes involving collective atomic recoil motion.
- To investigate the influence of condensate structure on wave-mixing efficiency.
Main Methods:
- Development of a semiclassical theoretical framework.
- Analysis of elementary excitations with dominant collective atomic recoil motion.
- Examination of stimulated Raman and hyper-Raman scattering processes.
Main Results:
- Optical processes are identified as stimulated Raman or hyper-Raman scattering.
- Forward wave-mixing is reduced by the condensate structure factor.
- Backward wave-mixing is enhanced due to condensate properties and stimulated hyper-Raman gain.
Conclusions:
- The theoretical framework accurately describes light-wave mixing in quantum gases.
- Collective atomic recoil motion significantly influences optical processes.
- Bose-Einstein condensates exhibit enhanced backward light-wave mixing with narrow resonances.
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