title: d-wave collapse and explosion of a dipolar bose-einstein condensate.
abstract: We investigate the collapse dynamics of a dipolar condensate of 52Cr atoms when the s-wave scattering length characterizing the contact interaction is reduced below a critical value. A complex dynamics, involving an anisotropic, d-wave symmetric explosion of the condensate, is observed. The atom number decreases abruptly during the collapse. We find good agreement between our experimental results and those of a numerical simulation of the three-dimensional Gross-Pitaevskii equation, including contact and dipolar interactions as well as three-body losses. The simulation indicates that the collapse induces the formation of two vortex rings with opposite circulations.
authors.affiliation: 5. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany.
authors.forename: T
authors.initials: T
authors.lastname: Lahaye
authors.forename: J
authors.initials: J
authors.lastname: Metz
authors.forename: B
authors.initials: B
authors.lastname: Fröhlich
authors.forename: T
authors.initials: T
authors.lastname: Koch
authors.forename: M
authors.initials: M
authors.lastname: Meister
authors.forename: A
authors.initials: A
authors.lastname: Griesmaier
authors.forename: T
authors.initials: T
authors.lastname: Pfau
authors.forename: H
authors.initials: H
authors.lastname: Saito
authors.forename: Y
authors.initials: Y
authors.lastname: Kawaguchi
authors.forename: M
authors.initials: M
authors.lastname: Ueda