title: Phase fluctuations in atomic Bose gases.
abstract: We improve on the Popov theory for partially Bose-Einstein condensed atomic gases by treating the phase fluctuations exactly. As a result, the theory becomes valid in arbitrary dimensions and is able to describe the low-temperature crossover between three-, two-, and one-dimensional Bose gases, which is currently being explored experimentally. We consider both homogeneous and trapped Bose gases.
authors.affiliation: Institute for Theoretical Physics, Utrecht University, Leuvenlaan 4, 3584 CE Utrecht, The Netherlands.
authors.forename: J O
authors.initials: JO
authors.lastname: Andersen
authors.forename: U
authors.initials: U
authors.lastname: Al Khawaja
authors.forename: H T C
authors.initials: HT
authors.lastname: Stoof