Shear viscosity and imperfect fluidity in bosonic and fermionic superfluids
Shear viscosity and imperfect fluidity in bosonic and fermionic superfluids
In this paper we address the ratio of the shear viscosity to entropy density $\ensuremath{\eta}/s$ in bosonic and fermionic superfluids. A small $\ensuremath{\eta}/s$ is associated with nearly perfect fluidity, and more general measures of the fluidity perfection/imperfection are of wide interest to a number of communities. We use a Kubo …