d-wave collapse and explosion of a dipolar bose-einstein condensate.
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.
Lahaye
T
T
5. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70550 Stuttgart, Germany.
Metz
J
J
Fröhlich
B
B
Koch
T
T
Meister
M
M
Griesmaier
A
A
Pfau
T
T
Saito
H
H
Kawaguchi
Y
Y
Ueda
M
M