title: Can a Bose gas be saturated?
abstract: We scrutinize the concept of saturation of the thermal component in a partially condensed trapped Bose gas. Using a 39K gas with tunable interactions, we demonstrate strong deviation from Einstein's textbook concept of a saturated vapor. However, the saturation picture can be recovered by extrapolation to the strictly noninteracting limit. We provide evidence for the universality of our observations through additional measurements with a different atomic species, 87Rb.
authors.affiliation: Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom.
authors.forename: Naaman
authors.initials: N
authors.lastname: Tammuz
authors.forename: Robert P
authors.initials: RP
authors.lastname: Smith
authors.forename: Robert L D
authors.initials: RL
authors.lastname: Campbell
authors.forename: Scott
authors.initials: S
authors.lastname: Beattie
authors.forename: Stuart
authors.initials: S
authors.lastname: Moulder
authors.forename: Jean
authors.initials: J
authors.lastname: Dalibard
authors.forename: Zoran
authors.initials: Z
authors.lastname: Hadzibabic