Equilibration between edge states in the fractional quantum Hall effect regime at high imbalances

TL;DR

This paper experimentally investigates how edge states in the fractional quantum Hall regime equilibrate at high imbalances, revealing anomalous conductance behavior at filling factor 2/5 that challenges existing models.

Contribution

It demonstrates that the independent edge state model fails at filling factor 2/5, highlighting the need for revised theoretical understanding of edge state interactions.

Findings

Observed anomalous conductance increase at ν=2/5

Challenged the validity of the independent edge state model

Provided experimental data on high imbalance edge state equilibration

Abstract

We experimentally study equilibration between edge states, co-propagating at the edge of the fractional quantum Hall liquid, at high initial imbalances. We find an anomalous increase of the conductance between the fractional edge states at the filling factor $\nu=2/5$ in comparison with the expected one for the model of independent edge states. We conclude that the model of independent fractional edge states is not suitable to describe the experimental situation at $\nu=2/5$.