Direct, Non-Destructive Imaging of Magnetization in a Spin-1 Bose Gas

Details Direct, Non-Destructive Imaging of Magnetization in a Spin-1 Bose Gas Direct, Non-Destructive Imaging of Magnetization in a Spin-1 Bose Gas

2005-02-21

arxiv.org/abs/cond-mat/0502517v1

Physics

Condensed Matter

Other Condensed Matter

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.95.050401

Polarization-dependent phase-contrast imaging is used to spatially resolve the magnetization of an optically trapped ultracold gas. This probe is applied to Larmor precession of degenerate and nondegenerate spin-1 $^{87}$Rb gases. Transverse magnetization of the Bose-Einstein condensate persists for the condensate lifetime, with a spatial response to magnetic field inhomogeneities consistent with a mean-field model of interactions. Rotational symmetry implies that the Larmor frequency of a spinor condensate be density-independent, and thus suitable for precise magnetometry with high spatial resolution. In comparison, the magnetization of the noncondensed gas decoheres rapidly.

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