Spontaneously modulated spin textures in a dipolar spinor Bose-Einstein condensate

Abstract

Helical spin textures in a ${}^{87}$Rb F=1 spinor Bose-Einstein condensate are found to decay spontaneously toward a spatially modulated structure of spin domains. This evolution is ascribed to magnetic dipolar interactions that energetically favor the short-wavelength domains over the long-wavelength spin helix. This is confirmed by eliminating the dipolar interactions by a sequence of rf pulses and observing a suppression of the formation of the short-range domains. This study confirms the significance of magnetic dipole interactions in degenerate ${}^{87}$Rb F=1 spinor gases.

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