Vortices with free ends in superfluid He3-A
Volovik G.E., Mineev V.P.
It is shown that vortex lines with free ends exist in the superfluid A phase о He3. The circulation of the superfluid velocity about an infinitesimally small contour surrounding the vortex line is equal to 2пЪ/ m. The velocity field near t end of the vortex coincides with the vector-potential field of the Dirac monopole