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arXiv · 1111.6039

The effect of light assisted collisions on matter wave coherence in superradiant Bose-Einstein condensates

N. S. Kampel·A. Griesmaier·M. P. Hornbak Steenstrup·F. Kaminski·E. S. Polzik·J. H. Müller
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Abstract

We investigate experimentally the effects of light assisted collisions on the coherence between momentum states in Bose-Einstein condensates. The onset of superradiant Rayleigh scattering serves as a sensitive monitor for matter wave coherence. A subtle interplay of binary and collective effects leads to a profound asymmetry between the two sides of the atomic resonance and provides far bigger coherence loss rates for a condensate bathed in blue detuned light than previously estimated. We present a simplified quantitative model containing the essential physics to explain our experimental data and point at a new experimental route to study strongly coupled light matter systems.

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N. S. Kampel, A. Griesmaier, M. P. Hornbak Steenstrup, F. Kaminski, E. S. Polzik, J. H. Müller. 2011-11-25. The effect of light assisted collisions on matter wave coherence in superradiant Bose-Einstein condensates. https://doi.org/10.1103/physrevlett.108.090401

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