Scaling analysis of the quasiparticle tunneling in the ${\mathbb Z}_k$ parafermion states

TL;DR

This paper investigates the scaling behavior of quasiparticle tunneling in ${ m Z}_k$ parafermion states within fractional quantum Hall systems, focusing on non-Abelian quasiholes on a cylinder to understand long-distance tunneling effects.

Contribution

It extends previous disk-based studies by analyzing quasiparticle tunneling on a cylinder with tunable aspect ratio, revealing insights into non-Abelian quasiparticle scaling behaviors.

Findings

Scaling behavior differs between Abelian and non-Abelian quasiparticles.

Long tunneling distances show anomalous corrections in the scaling parameters.

Cylinder geometry allows for larger tunable tunneling distances than disk geometry.

Abstract

Quasiparticle tunneling between two counter-propagating edges through point contacts could provide information on the statistics of the quasiparticles. Previous study on a disk found a scaling behavior by varying the tunneling distance. It was found that in the limit with zero tunneling distance, the Abelian quasiparticles tunneling obey the scaling analysis while the non-Abelian quasiparticles exhibit some non-trivial behaviors on the scaling exponents. Because of the limitation of disk geometry, we put the fractional quantum Hall (FQH) state on the surface of a cylinder which has a larger tunable tunneling distance than that on disk by varying the aspect ratio $\gamma$. We analyze the scaling behavior of the quasiholes, especially the non-Abelian quasiholes in the Read-Rezayi ${\mathbb Z}_k$ parafermion states. We aim to address the existance of the anomalous correction of the scaling parameter in the long tunneling distance.