Solitons in Superfluid <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mmultiscripts><mrow><mi mathvariant="normal">He</mi></mrow><mprescripts></mprescripts><mrow></mrow><mrow><mn>3</mn></mrow><mrow></mrow><mrow></mrow></mmultiscripts></mrow></math></span>-<span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>A</mi></math></span>: Bound States on Domain Walls

T. L. Ho; J. R. Fulco; J. R. Schrieffer; F. Wilczek

doi:10.1103/PhysRevLett.52.1524

Solitons in Superfluid ${}^{3}{He}$ - $A$ : Bound States on Domain Walls

T. L. Ho, J. R. Fulco, J. R. Schrieffer, and F. Wilczek

Phys. Rev. Lett. 52, 1524 – Published 23 April 1984

Abstract

The effects of solitons on the spectrum of fermion excitations in superfluid ${}^{3}{He}$ - $A$ are investigated. It is found that there is a two-dimensional manifold of bound states with energies within the gap of the bulk superfluid. The bound-state spectrum lacks inversion symmetry parallel to the wall.