Impact of photo-assisted collisions on superradiant light scattering with Bose condensates
Xinyu Luo (Institute of Physics, Chinese Academy of Sciences, Beijing,, China), Kuiyi Gao (Institute of Physics, Chinese Academy of Sciences,, Beijing, China), L. Deng (Physical Measurement Laboratory, National Institute, of Standards, Technology, Gaithersburg, Maryland USA)
TL;DR
This paper investigates how photo-assisted collisions affect superradiant light scattering in Bose-Einstein condensates, revealing that secondary collision effects cause asymmetry in scattering efficiency and impact condensate coherence.
Contribution
It provides experimental evidence that light-assisted collisions are the primary cause of asymmetry in superradiant scattering efficiency in condensates.
Findings
Secondary effects of light-assisted collisions cause asymmetry in scattering.
Heating effects are similar across different pump polarizations.
Condensate coherence degradation reduces superradiant scattering efficiency.
Abstract
We present experimental evidence supporting the postulation that the secondary effects of light-assisted collisions are the main reason that the superradiant light scattering efficiency in condensates is asymmetric with respect to the sign of the pump-laser detuning. Contrary to the recent experimental study, however, we observe severe and comparable heating with all three pump-laser polarizations. We also perform two-color, double-pulse measurements to directly study the degradation of condensate coherence and the resulting impact on the superradiant scattering efficiency.
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