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arXiv · 1212.5469

Resonant demagnetization of a dipolar BEC in a 3D optical lattice

A. de Paz·A. Chotia·E. Marechal·P. Pedri·L. Vernac·O. Gorceix·B. Laburthe-Tolra
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Abstract

We study dipolar relaxation of a chromium BEC loaded into a 3D optical lattice. We observe dipolar relaxation resonances when the magnetic energy released during the inelastic collision matches an excitation towards higher energy bands. A spectroscopy of these resonances for two orientations of the magnetic field provides a 3D band spectroscopy of the lattice. The narrowest resonance is registered for the lowest excitation energy. Its line-shape is sensitive to the on-site interaction energy. We use such sensitivity to probe number squeezing in a Mott insulator, and we reveal the production of three-body states with entangled spin and orbital degrees of freedom.

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A. de Paz, A. Chotia, E. Marechal, P. Pedri, L. Vernac, O. Gorceix, B. Laburthe-Tolra. 2012-12-21. Resonant demagnetization of a dipolar BEC in a 3D optical lattice. https://doi.org/10.1103/physreva.87.051609

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