title: Crossover from one to three dimensions for a gas of hard-core bosons.
abstract: We develop a variational theory of the crossover from the one-dimensional (1D) regime to the 3D regime for ultracold Bose gases in thin waveguides. Within the 1D regime we map out the parameter space for fermionization, which may span the full 1D regime for suitable transverse confinement.
authors.affiliation: Optical Sciences Center and Department of Physics, University of Arizona, Tucson, Arizona 85721, USA. kdas@optics.arizona.edu
authors.forename: Kunal K
authors.initials: KK
authors.lastname: Das
authors.forename: M D
authors.initials: MD
authors.lastname: Girardeau
authors.forename: E M
authors.initials: EM
authors.lastname: Wright