Kinetics of Bose-Einstein Condensation in a Trap

Details Kinetics of Bose-Einstein Condensation in a Trap Kinetics of Bose-Einstein Condensation in a Trap

1997-07-18

arxiv.org/abs/quant-ph/9707037v1

Phys.Rev.Lett. 79 (1997) 1793-1796

Physics

Quantum Physics

9 pages, Revtex

Scientific paper

10.1103/PhysRevLett.79.1793

The formation process of a Bose-Einstein condensate in a trap is described using a master equation based on quantum kinetic theory, which can be well approximated by a description using only the condensate mode in interaction with a thermalized bath of noncondensate atoms. A rate equation of the form n = 2W(n)[(1-exp((mu_n - mu)/kT))n + 1] is derived, in which the difference between the condensate chemical potential mu_n and the bath chemical potential mu gives the essential behavior. Solutions of this equation, in conjunction with the theoretical description of the process of evaporative cooling, give a characteristic latency period for condensate formation and appear to be consistent with the observed behavior of both rubidium and sodium condensate formation.

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