title: Bose-einstein condensation in quasi-2D trapped gases
abstract: We discuss Bose-Einstein condensation (BEC) in quasi-2D trapped gases and find that well below the transition temperature T(c) the equilibrium state is a true condensate, whereas at intermediate temperatures T<T(c) one has a quasicondensate (condensate with fluctuating phase). The mean-field interaction in a quasi-2D gas is sensitive to the frequency omega(0) of the (tight) confinement in the "frozen" direction, and one can switch the sign of the interaction by changing omega(0). Variation of omega(0) can also reduce the rates of inelastic processes. This offers promising prospects for tunable BEC in trapped quasi-2D gases.
authors.affiliation: FOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, The Netherlands and Russian Research Center, Kurchatov Institute, Kurchatov Square, 123182 Moscow, Russia.
authors.initials: DS
authors.lastname: Petrov
authors.initials: M
authors.lastname: Holzmann
authors.initials: GV
authors.lastname: Shlyapnikov