Ground state of a Bose-Einstein condensate which scatters coherently laser radiation
A.F. Ioffe Physico-Technical Institute, Politekhnicheskaya 26,
194021 St. Petersburg, Russia
Revised: 11 October 1999
Published online: 15 March 2000
We present a self-consistent method of taking into account back action of a laser radiation to a Bose-Einstein condensate of neutral atoms. The light is coherently scattered inside the degenerate atomic sample, thus its intensity and, consequently, the atomic ground level AC Stark shift are spatially varying. This leads to a small deformation of the atomic cloud and, if the external radiation is abruptly switched off, to generation of collective excitations.
PACS: 03.75.Fi – Phase coherent atomic ensembles; quantum condensation phenomena / 32.80.-t – Photon interactions with atoms / 42.50.Vk – Mechanical effects of light on atoms, molecules, electrons, and ions
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000