Publication Date:
2006
abstract:
We have measured the relative strength "dd of the magnetic dipole-dipole interaction compared with the
contact interaction in a dipolar chromium Bose-Einstein condensate. We analyze the asymptotic velocities
of expansion of the condensate with different orientations of the atomic magnetic moments. By comparing
the experimental results with numerical solutions of the hydrodynamic equations for dipolar condensates,
we obtain edd= 0,159 +- 0,034.We use this result to determine the s-wave scattering length a = 5,08 +-
1,06 x 10^-9 m = 96 +- 20 a0 of 52Cr. This is fully consistent with our previous measurements on the
basis of Feshbach resonances and therefore confirms the validity of the theoretical approach used to
describe the dipolar Bose-Einstein condensate.
contact interaction in a dipolar chromium Bose-Einstein condensate. We analyze the asymptotic velocities
of expansion of the condensate with different orientations of the atomic magnetic moments. By comparing
the experimental results with numerical solutions of the hydrodynamic equations for dipolar condensates,
we obtain edd= 0,159 +- 0,034.We use this result to determine the s-wave scattering length a = 5,08 +-
1,06 x 10^-9 m = 96 +- 20 a0 of 52Cr. This is fully consistent with our previous measurements on the
basis of Feshbach resonances and therefore confirms the validity of the theoretical approach used to
describe the dipolar Bose-Einstein condensate.
Iris type:
01.01 Articolo in rivista
List of contributors:
Fattori, Marco
Published in: