Abstract
We discuss Bose-Einstein condensation (BEC) in quasi-2D trapped gases and find that well below the transition temperature the equilibrium state is a true condensate, whereas at intermediate temperatures one has a quasicondensate (condensate with fluctuating phase). The mean-field interaction in a quasi-2D gas is sensitive to the frequency of the (tight) confinement in the “frozen” direction, and one can switch the sign of the interaction by changing . Variation of can also reduce the rates of inelastic processes. This offers promising prospects for tunable BEC in trapped quasi-2D gases.
- Received 27 September 1999
DOI:https://doi.org/10.1103/PhysRevLett.84.2551
©2000 American Physical Society