title: Bose-Einstein condensation of erbium.
abstract: We report on the achievement of Bose-Einstein condensation of erbium atoms and on the observation of magnetic Feshbach resonances at low magnetic fields. By means of evaporative cooling in an optical dipole trap, we produce pure condensates of 168Er, containing up to 7×10(4) atoms. Feshbach spectroscopy reveals an extraordinary rich loss spectrum with six loss resonances already in a narrow magnetic-field range up to 3 G. Finally, we demonstrate the application of a low-field Feshbach resonance to produce a tunable dipolar Bose-Einstein condensate and we observe its characteristic d-wave collapse.
authors.affiliation: Institut für Experimentalphysik and Zentrum für Quantenphysik, Universität Innsbruck, Innsbruck, Austria.
authors.forename: K
authors.initials: K
authors.lastname: Aikawa
authors.forename: A
authors.initials: A
authors.lastname: Frisch
authors.forename: M
authors.initials: M
authors.lastname: Mark
authors.forename: S
authors.initials: S
authors.lastname: Baier
authors.forename: A
authors.initials: A
authors.lastname: Rietzler
authors.forename: R
authors.initials: R
authors.lastname: Grimm
authors.forename: F
authors.initials: F
authors.lastname: Ferlaino