title: Bose-Einstein condensation of chromium.
abstract: We report on the generation of a Bose-Einstein condensate in a gas of chromium atoms, which have an exceptionally large magnetic dipole moment and therefore underlie anisotropic long-range interactions. The preparation of the chromium condensate requires novel cooling strategies that are adapted to its special electronic and magnetic properties. The final step to reach quantum degeneracy is forced evaporative cooling of 52Cr atoms within a crossed optical dipole trap. At a critical temperature of T(c) approximately 700 nK, we observe Bose-Einstein condensation by the appearance of a two-component velocity distribution. We are able to produce almost pure condensates with more than 50,000 condensed 52Cr atoms.
authors.affiliation: 5. Physikalisches Institut, Universität Stuttgart, 70550 Stuttgart, Germany. a.griesmaier@physik.uni-stuttgart.de
authors.forename: Axel
authors.initials: A
authors.lastname: Griesmaier
authors.forename: Jörg
authors.initials: J
authors.lastname: Werner
authors.forename: Sven
authors.initials: S
authors.lastname: Hensler
authors.forename: Jürgen
authors.initials: J
authors.lastname: Stuhler
authors.forename: Tilman
authors.initials: T
authors.lastname: Pfau