We study a two-phase sample of superfluid 3He where vorticity exists in one phase (3He−A) but cannot penetrate across the interfacial boundary to a second coherent phase (3He−B). We calculate the bending of the vorticity into a surface vortex sheet on the interface and solve the internal structure of this new type of vortex sheet. The compression of the vorticity from three to two dimensions enforces a structure which is made up of 12-quantum units, independently of the structure of the source vorticity in the bulk. These results are consistent with our NMR measurements.
- superfluid 3He
- vortex sheet
Hänninen, R., Blaauwgeers, R., Eltsov, V., Finne, A., Krusius, M., Thuneberg, E., & Volovik, G. (2003). Structure of the surface vortex sheet between two rotating 3He superfluids. Physical Review Letters, 90(22), 1-4. . https://doi.org/10.1103/PhysRevLett.90.225301