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Spinor condensates with a laser-induced quadratic Zeeman effect
L. Santos, M. Fattori, J. Stuhler +1
We show that an effective quadratic Zeeman effect can be generated in Cr by proper laser configurations, and in particular by the dipole trap itself. The induced quadratic Z…
Damagnetization cooling of a gas
M. Fattori, T. Koch, S. Goetz +4
We demonstrate demagnetization cooling of a gas of ultracold Cr atoms. Demagnetization is driven by inelastic dipolar collisions which couple the motional degrees of freedom…
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…
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…
Observation of dipole-dipole interaction in a degenerate quantum gas
J. Stuhler, A. Griesmaier, T. Koch +5
We have investigated the expansion of a Bose-Einstein condensate (BEC) of strongly magnetic chromium atoms. The long-range and anisotropic magnetic dipole-dipole interaction leads…
Production of a chromium Bose-Einstein condensate
Axel Griesmaier, Jürgen Stuhler, Tilman Pfau
The recent achievement of Bose-Einstein condensation of chromium atoms [1] has opened longed-for experimental access to a degenerate quantum gas with long-range and anisotropic int…
Bose-Einstein condensation of chromium
Axel Griesmaier, Jörg Werner, Sven Hensler +2
We report on the generation of a Bose-Einstein condensate in a gas of chromium atoms, which will make studies of the effects of anisotropic long-range interactions in degenerate qu…
Observation of Feshbach resonances in an ultracold gas of Cr
J. Werner, A. Griesmaier, S. Hensler +4
We have observed Feshbach resonances in elastic collisions between ultracold Cr atoms. This is the first observation of collisional Feshbach resonances in an atomic specie…