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 af=2-af=0 is 2.47±0.27 Bohr radii.

authors

• Black A.T.
• Gómez García Eduardo
• Jung S.
• Lett P.D.
• Turner L.D.

publication date

• 2007-01-01

published in

• Physical Review Letters  Journal

keywords

• Antiferromagnetism; Approximation theory; Magnetic field effects; Phase diagrams; Spin oscillations; Spinor dynamics; Molecular dynamics

Digital Object Identifier (DOI)

• 10.1103/PhysRevLett.99.070403

start page

end page

volume

• 99

issue

• 7