On the symmetry and structure of quantized vortices in superfluid 3He-B

Author(s): J. A. Sauls and J. W. Serene
Comments: 2 Journal pages
Journal-ref: Physical Review B, 32, 4782-4783 (1985)

Recent theoretical attempts to explain the observed vortex-core phase transition in superfluid 3He yield conflicting results. Variational calculations by Fetter and Theodrakis, based on realistic strong-coupling parameters, yield a phase transition in the Ginzburg-Landau region that is in qualitative agreement with the phase diagram. Numerically precise calculations by Salomaa and Volovik (SV), based on the Brinkman-Serene-Anderson (BSA) parameters, do not yield a phase transition between axially symmetric vortices. The ambiguity of these results is in part due to the large differences between the β parameters, which are inputs to the vortex free-energy functional. We comment on the relative merits of the β parameters based on recent improvements in the quasiparticle scattering amplitude and the BSA parameters used by SV.

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