Non-Hermitian skin effect (NHSE) is a unique feature studied extensively in noninteracting non-Hermitian systems. In this paper, we extend the NHSE originally discovered systems to interacting many-body by investigating an exactly solvable model, i.e., prototypical Lieb-Liniger Bose gas with imaginary vector potential. We show that model can also be solved through Bethe ansatz. By solving ansat...

We study the collisional processes that can lead to thermalization in one-dimensional (1D) systems. For two-body collisions, excitations of transverse modes are the prerequisite for energy exchange and thermalization. At very low temperatures, excitations of transverse modes are exponentially suppressed, thermalization by two-body collisions stops and the system should become integrable. In qua...