On a theory of light scattering from a Bose-Einstein condensate

18th International Conference PhysicA.SPb

Ezhova, V.M.^1 ; Gerasimov, L.V.^1 ; Kupriyanov, D.V.^1

Department of Theoretical Physics, Peter the Great Saint-Petersburg Polytechnic University, St-Petersburg

195251, Russia^1

关键词: Atomic sample;    Bose-Einstein condensates;    Density correction;    Elastic light scattering;    Radiation loss;    Resonance excitation;    Scattering amplitudes;    Static interaction;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/769/1/012045/pdf
DOI  :  10.1088/1742-6596/769/1/012045

来源: IOP

【 摘 要 】

We consider a quantum theory of elastic light scattering from a macroscopic atomic sample existing in the Bose-Einstein condensate (BEC) phase. Following the second quantized formalism we introduce a set of coupled and closed diagram equations for the polariton propagator contributing to the T -matrix and scattering amplitude. Our approach allows us to follow important density corrections to the quasi-energy structure caused by static interaction and radiation losses associated with incoherent scattering in the case of near resonance excitation.