Dynamical suppression of many-body non-Hermitian skin effect in Anyonic systems

TL;DR

This paper investigates how anyonic statistics can suppress or reverse the non-Hermitian skin effect in many-body systems, revealing new dynamics and information spreading phenomena with potential experimental realizations.

Contribution

It demonstrates that anyonic statistics profoundly influence NHSE dynamics, surpassing effects of particle interactions, and uncovers exotic information spreading behaviors in such systems.

Findings

Anyonic statistics can suppress or reverse NHSE in many-body systems.

The effect is more pronounced with increasing particle number.

Information dynamics differ between thermal ensembles and single states under NHSE.

Abstract

The non-Hermitian skin effect (NHSE) is a fascinating phenomenon in nonequilibrium systems where eigenstates massively localize at the systems' boundaries, pumping (quasi-)particles loaded in these systems unidirectionally to the boundaries. Its interplay with many-body effects have been vigorously studied recently, and inter-particle repulsion or Fermi degeneracy pressure have been shown to limit the boundary accumulation induced by the NHSE both in their eigensolutions and dynamics. However, in this work we found that anyonic statistics can even more profoundly affect the NHSE dynamics, suppressing or even reversing the state dynamicss against the localizing direction of the NHSE. This phenomenon is found to be more pronounced when more particles are involved.The spreading of quantum information in this system shows even more exotic phenomena, where NHSE affects only the information dynamics for a thermal ensemble, but not that for a single initial state. Our results open up a new avenue on exploring novel non-Hermitian phenomena arisen from the interplay between NHSE and anyonic statistics, and can potentially be demonstrated in ultracold atomic quantum simulators and quantum computers.