Symmetries and dynamics of quantum Hall bulk anyons in quadratic potentials

Abstract

We study two-particle coherent states and their dynamics in the lowest Landau level (LLL) under the influence of quadratic potentials. We focus on generalized coherent states that describe Abelian anyons in the LLL and are associated with the $\mathfrak{su}(1,1)$ Lie algebra. We draw on parallels with quantum optics and symmetry properties of the coherent states considered here to analytically calculate quantities such as a bunching parameter, which depends on quantum statistics, as well as coherent state trajectories under the influence of generic quadratic potentials. Our results show that in unbounded saddle potentials, the bunching parameter governs the trajectories which show exponentially diverging behavior in a manner that depends on quantum statistics. In bounded elliptical potentials, the bunching parameter is oscillatory and its maximum magnitude depends on the eccentricity of the applied potential. We draw connections between our analyses and the key concepts that underlie anyon detection in recent experiments.