Dissipation and Bulk Viscosity in 1D Spin-Polarized Fermi Gases

One-dimensional quantum liquids at low energy are often described by the Luttinger liquid model. To investigate dissipative effects, it is necessary to include non-linear terms whose form depend on the microscopic details of the system. For example, in the investigation of the bulk viscosity of 1D non-relativistic Fermi gases with even parity interactions, three-body effects are required to generate a finite bulk viscosity that is inconsistent with the conformal symmetry. In this talk we address these questions and evaluate the bulk viscosity for a non-relativistic spin polarized Fermi gas with odd parity interactions. We find results consistent with non-relativistic conformal symmetry, as the bulk viscosity is due to two-body interactions beyond the Luttinger liquid model.