Anisotropic excitation spectrum of a dipolar quantum Bose gas
We measure the excitation spectrum of a dipolar chromium Bose-Einstein condensate with Raman-Bragg spectroscopy.
arXiv:1205.6305 (2012) / Phys. Rev. Lett. 109, 155302 (2012)
Tag Gabriel Bismut
Excitations of a dipolar Bose-Einstein condensate
French version: Excitations d’un condensat de Bose-Einstein dipolaire Nos expériences ont été consacrées à l’étude d’un condensat de chrome, élément possédant un fort moment magnétique. Elles nous ont permis de mettre en évidence l’influence des interactions dipolaires sur les propriétés…
Spontaneous demagnetization of a dipolar spinor Bose gas at ultralow magnetic field
We study the spinor properties of 𝑆 =3 52Cr condensates, in which dipole-dipole interactions allow changes in magnetization.
arXiv:1103.4819 (2011) / Phys. Rev. Lett. 106, 255303 (2011)
Seminar: LPL PHD student day, Villetaneuse
Excitations collectives dans un condensat de Bose-Einstein dipolaire
Spin relaxation and band excitation of a dipolar BEC in 2D optical lattices
We observe interband transitions mediated by dipole-dipole interactions for an array of 1D quantum gases of chromium atoms, trapped in a 2D optical lattice.
arXiv:1010.3241 (2010) / Phys. Rev. Lett. 106, 015301 (2011)
Collective excitations of a dipolar Bose-Einstein condensate
We have measured the effect of dipole-dipole interactions on the frequency of a collective mode of a Bose-Einstein condensate.
arXiv:1005.2493 (2010) / Phys. Rev. Lett. 105, 040404 (2010)
Optimized loading of an optical dipole trap for the production of chromium BECs
We report on a strategy to maximize the number of chromium atoms transferred from a magneto-optical trap into an optical trap through accumulation in metastable states via strong optical pumping.
arXiv:1004.3642 (2010) / Appl. Phys. B 102, 1 (2011)
Conference: Young Atom Opticians, Amsterdam
Collective excitations in a dipolar Bose-Einstein condensate
Control of dipolar relaxation in external fields
We study dipolar relaxation in both ultracold thermal and Bose-condensed Cr atom gases. We show three different ways to control dipolar relaxation, making use of either a static magnetic field, an oscillatory magnetic field, or an optical lattice to reduce the dimensionality of the gas from three-dimensional (3D) to two-dimensional (2D).
arXiv:1002.0222 (2010) / Phys. Rev. A 81, 042716 (2010)
Les Houches
Studying dipolar effects in degenerate quantum gases of chromium atoms