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

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...

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Bibliographic Details
Published inarXiv.org
Main Authors de Paz, A, Chotia, A, Marechal, E, Pedri, P, Vernac, L, Gorceix, O, Laburthe-Tolra, B
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 21.12.2012
Subjects
Chromium
Demagnetization
Energy bands
Excitation
Inelastic collisions
Magnetic induction
Magnetic resonance
Optical lattices
Physics - Quantum Gases
Spectroscopy
Spectrum analysis
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1212.5469