Spin superfluidity in 3He

The existence of spin supercurrents in 3He-B was studied and the analogy between spin superfluidity and usual mass superluidity and superconductivity was demonstrated. It was observed that the electric field should pay the same role for spin supercurrent that the magnetic field vector potential does for superconducting electrons. The homogeneously processing domain was observed in 3He-B and also in the B-like phase of 3He in an aerogel. It was also observed that at sufficiently low temperatures and high magnetic fields, the effective spin diffusion coefficient in Fermi liquids becomes comples, allowing for dissipationless spin currents.