Comparing contact and dipolar interaction in a Bose-Einstein condensate
Other Condensed Matter
2007-05-23 v1
Abstract
We have measured the relative strength of the magnetic dipole-dipole interaction compared to the contact interaction in a chromium Bose-Einstein condensate. We analyze the asymptotic velocities of expansion of a dipolar chromium BEC with different orientations of the atomic magnetic dipole moments. By comparing them with numerical solutions of the hydrodynamic equations for dipolar condensates, we are able to determine with high accuracy. Since the absolute strength of the dipole-dipole interaction is known exactly, the relative strength of the dipoledipole interaction can be used to determine the s-wave scattering length of 52Cr. This is fully consistent with our previous measurements on the basis of Feshbach resonances.
Keywords
Cite
@article{arxiv.cond-mat/0608171,
title = {Comparing contact and dipolar interaction in a Bose-Einstein condensate},
author = {Axel Griesmaier and Jürgen Stuhler and Tobias Koch and Marco Fattori and Tilman Pfau and Stefano Giovanazzi},
journal= {arXiv preprint arXiv:cond-mat/0608171},
year = {2007}
}