We investigate the interaction of a moving BEC with a far detuned laser beam. Superradiant Rayleigh scattering arises from the spontaneous formation of a matter-wave grating due to the interference of two wavepackets with different momenta. The system is described by the CARL-BEC model which is a generalization of the Gross-Pitaevskii model to include the setf-consistent evolution of the scattered field. The experiment gives evidence of a damping of the matter-wave grating which depends on the initial velocity of the condensate. We describe this damping in terms of a phase-diffusion decoherence process, in good agreement with the experimental results.
Superradiant light scattering from a moving Bose-Einstein condensate / R. Bonifacio; F. S. Cataliotti; M. Cola; L. Fallani; C. Fort; N. Piovella; M. Inguscio. - In: OPTICS COMMUNICATIONS. - ISSN 0030-4018. - STAMPA. - 233:(2004), pp. 155-160. [doi:10.1016/j.optcom.2004.01.027]
Superradiant light scattering from a moving Bose-Einstein condensate
CATALIOTTI, FRANCESCO SAVERIO;FALLANI, LEONARDO;FORT, CHIARA;INGUSCIO, MASSIMO
2004
Abstract
We investigate the interaction of a moving BEC with a far detuned laser beam. Superradiant Rayleigh scattering arises from the spontaneous formation of a matter-wave grating due to the interference of two wavepackets with different momenta. The system is described by the CARL-BEC model which is a generalization of the Gross-Pitaevskii model to include the setf-consistent evolution of the scattered field. The experiment gives evidence of a damping of the matter-wave grating which depends on the initial velocity of the condensate. We describe this damping in terms of a phase-diffusion decoherence process, in good agreement with the experimental results.
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