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arXiv · 0704.0925

Spinor Dynamics in an Antiferromagnetic Spin-1 Condensate

A. T. Black·E. Gomez·L. D. Turner·S. Jung·P. D. Lett
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Abstract

We observe coherent spin oscillations in an antiferromagnetic spin-1 Bose-Einstein condensate of sodium. The variation of the spin oscillations with magnetic field shows a clear signature of nonlinearity, in agreement with theory, which also predicts anharmonic oscillations near a critical magnetic field. Measurements of the magnetic phase diagram agree with predictions made in the approximation of a single spatial mode. The oscillation period yields the best measurement to date of the sodium spin-dependent interaction coefficient, determining that the difference between the sodium spin-dependent s-wave scattering lengths $a_{f=2}-a_{f=0}$ is $2.47\pm0.27$ Bohr radii.

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A. T. Black, E. Gomez, L. D. Turner, S. Jung, P. D. Lett. 2007-04-13. Spinor Dynamics in an Antiferromagnetic Spin-1 Condensate. https://doi.org/10.1103/physrevlett.99.070403

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