Shear viscosity in the strong interaction regime of a p-wave superfluid Fermi gas

The p-wave superfluid state is a promising spin-triplet and non s-wave pairing state in an ultracold Fermi gas. In this work we study the low-temperature shear viscosity of a one-component p-wave superfluid Fermi gas, by means of Kubo formalism. Our study is done in the strong-coupling limit where Fermi superfluid reduces into a system of composite bosons. Taking into account p(x)-wave Cooper channel in the self-energy, the viscous relaxation rates are determined. The relaxation rates related to these interactions are calculated as a function of temperature. Their temperature dependence is different from the s-wave superfluid Fermi gas, and this is due to the anisotropic pairing interaction in the p-wave superfluid. Our results contribute to understand how this anisotropy affects transport properties of this unconventional superfluid Fermi gas in low temperature limit. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

This study investigates the low-temperature shear viscosity of a one-component p-wave superfluid Fermi gas in the strong-coupling limit, taking into account the p-wave Cooper channel in the self-energy. The viscous relaxation rates determined are temperature-dependent and differ from the s-wave superfluid Fermi gas, due to anisotropic pairing interaction in the p-wave superfluid. This research contributes to understanding how anisotropy affects transport properties of this unconventional superfluid Fermi gas in the low temperature limit.