Spinor Dynamics in an Antiferromagnetic Spin-1 Condensate

Details Spinor Dynamics in an Antiferromagnetic Spin-1 Condensate Spinor Dynamics in an Antiferromagnetic Spin-1 Condensate

2007-04-06

arxiv.org/abs/0704.0925v2

Physics

Condensed Matter

Other Condensed Matter

5 pages, 2 figures. Changes: added reference, minor corrections

Scientific paper

10.1103/PhysRevLett.99.070403

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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