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Collective oscillations of dipolar Bose-Einstein condensates and accurate comparison between contact and dipolar interaction
S. Giovanazzi, L. Santos, T. Pfau
We propose a scheme for the measurement of the s-wave scattering length of an atom or molecule with significant dipole-dipole interaction with an accuracy at the percent level.…
Comparing contact and dipolar interaction in a Bose-Einstein condensate
Axel Griesmaier, Jürgen Stuhler, Tobias Koch +3
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 a…
Critical Temperature of Weakly Interacting Dipolar Condensates
Konstantin Glaum, Axel Pelster, Hagen Kleinert +1
We calculate perturbatively the effect of a dipolar interaction upon the Bose-Einstein condensation temperature. This dipolar shift depends on the angle between the symmetry axes o…
Expansion dynamics of a dipolar Bose-Einstein condensate
S. Giovanazzi, P. Pedri, L. Santos +5
Our recent measurements on the expansion of a chromium dipolar condensate after release from an optical trapping potential are in good agreement with an exact solution of the hydro…
Trapping atoms on a transparent permanent-magnet atom chip
A. Shevchenko, M. Heilio, T. Lindvall +4
We describe experiments on trapping of atoms in microscopic magneto-optical traps on an optically transparent permanent-magnet atom chip. The chip is made of magnetically hard ferr…