Non-Hermitian skin effect, macroscopic collapse of bulk states to the boundary, has been extensively studied in various experimental platforms. However, it remains an open question whether such topological phases persist in the presence of many-body interactions. Notably, previous studies have shown ...
In the superfluid phase, quasiparticle dispersions Ekσ form closed spectral loops on the complex plane, reminiscent of the eigenspectral point-gap topology associated with the seminal non-Hermitian skin effects35,36,37,38,39,48. The spectral winding number characterizing the ground-state point-gap...