We investigate the localization properties of a spin chain with an antiferromagnetic nearest-neighbor coupling, subject to external quasiperiodic on-site magnetic field. The modulation interpolates between two paradigmatic models, namely Aubry-Andr\'e and Fibonacci models. find that stronger many-body interactions extend ergodic phase in former, whereas they shrink it latter. Furthermore, trans...

We study non-Hermitian many-body physics in the interacting Hatano-Nelson model with an open boundary condition. The violation of reciprocity, resulting from imaginary vector potential, induces skin effect and causes exponential localization for all single-particle eigenfunctions noninteracting limit. Nevertheless, density profile system becomes only slightly tilted relative to average filling....