Europhys. Lett.
Volume 63, Number 6, September 2003
Page(s) 812 - 818
Section Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics
Published online 01 November 2003
DOI: 10.1209/epl/i2003-00594-y
Europhys. Lett., 63 (6) , pp. 812-818 (2003)

Continuous optical loading of a Bose-Einstein condensate in the Thomas-Fermi regime

F. Floegel, L. Santos and M. Lewenstein

Institut für Theoretische Physik, Universität Hannover - D-30167 Hannover, Germany

(Received 19 March 2003; accepted in final form 24 June 2003)

We discuss the optical loading of a Bose-Einstein condensate in the Thomas-Fermi regime. The condensate is loaded via spontaneous emission from a reservoir of excited-state atoms. By means of a master equation formalism, we discuss the modification of the condensate temperature during the loading. We identify the threshold temperature, $T_{\ab{th}}$, above (below) which the loading process leads to cooling (heating), respectively. The consequences of our analysis for the continuous loading of an atom laser are discussed.

42.50.Vk - Mechanical effects of light on atoms, molecules, electrons, and ions.
03.75.Kk - Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow.
03.75.Pp - Atom lasers.

© EDP Sciences 2003