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

J. M. Higbie·L. E. Sadler·S. Inouye·A. P. Chikkatur·S. R. Leslie·K. L. Moore·V. Savalli·D. M. Stamper-Kurn
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Abstract

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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J. M. Higbie, L. E. Sadler, S. Inouye, A. P. Chikkatur, S. R. Leslie, K. L. Moore, V. Savalli, D. M. Stamper-Kurn. 2005-02-21. Direct, Non-Destructive Imaging of Magnetization in a Spin-1 Bose Gas. https://doi.org/10.1103/physrevlett.95.050401

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