title: Regimes of quantum degeneracy in trapped 1D gases
abstract: We discuss the regimes of quantum degeneracy in a trapped 1D gas and obtain the diagram of states. Three regimes have been identified: the Bose-Einstein condensation (BEC) regimes of a true condensate and quasicondensate, and the regime of a trapped Tonks gas (gas of impenetrable bosons). The presence of a sharp crossover to the BEC regime requires extremely small interaction between particles. We discuss how to distinguish between true and quasicondensates in phase coherence experiments.
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: GV
authors.lastname: Shlyapnikov
authors.initials: JT
authors.lastname: Walraven