The coherence of superradiance

Raphael Lopes (1) , Almazbek Imanaliev (1) , Marie Bonneau (1) , Josselin Ruaudel (1) , Marc Cheneau (1) , Denis Boiron (1) , Christoph I Westbrook (2)

1 LCF - Laboratoire Charles Fabry
2 Laboratoire Charles Fabry / Optique atomique

We have measured the 2nd order coherence, or 2-body correlations, of atoms from a Bose--Einstein condensate participating in a superradiance process. We compare the statistics of the superradiant phenomenon with the ordinary spontaneous emission and with a coherent source obtained via a stimulated Raman transition of a Bose--Einstein condensate. Despite strong stimulated emission the correlation properties of the superradiance are close to those of a thermal sample.

Mots clés: Superradiance; Bose-Einstein condensate

Domaines: Physique Quantique [quant-ph]; Gaz Quantiques [cond-mat.quant-gas]

Raphael Lopes, Almazbek Imanaliev, Marie Bonneau, Josselin Ruaudel, Marc Cheneau, et al.. The coherence of superradiance. 2013. ⟨hal-00922184v1⟩