Continuous Vortices with Broken Symmetry in Rotating SuperfluidHe3-A

Abstract

New NMR measurements are reported on continuous ${}_{}{}^3{}_{}{}^{}\mathrm{He}$-$A$ vortices in tilted magnetic fields. We introduce a symmetry classification of the continuous vortices with broken axial symmetry. It is found that the discrete internal symmetry may in addition be broken in two inequivalent ways, producing two different continuous vortices. Although NMR may not distinguish between these two vortices, the observed vortex satellite peak is well accounted for by spin waves localized in the soft core of such vortices.