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Article Dans Une Revue Physical Review A : Atomic, molecular, and optical physics [1990-2015] Année : 2014

Second-order coherence of superradiance from a Bose-Einstein condensate

Résumé

We have measured the 2-particle correlation function of atoms from a Bose--Einstein condensate participating in a superradiance process, which directly reflects the 2nd order coherence of the emitted light. We compare this correlation function with that of atoms undergoing stimulated emission. Whereas the stimulated process produces correlations resembling those of a coherent state, we find that superradiance, even in the presence of strong gain, shows a correlation function close to that of a thermal state, just as for ordinary spontaneous emission.
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Dates et versions

hal-00922184 , version 1 (24-12-2013)
hal-00922184 , version 2 (01-06-2014)

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Raphael Lopes, Almazbek Imanaliev, Marie Bonneau, Josselin Ruaudel, Marc Cheneau, et al.. Second-order coherence of superradiance from a Bose-Einstein condensate. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2014, 90 (1), pp.013615. ⟨10.1103/PhysRevA.90.013615⟩. ⟨hal-00922184v2⟩
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