We consider the absorption of microwaves by a quantum Hall droplet. We show that the number and velocities of charged edge modes can be directly measured from a droplet of known shape. In contrast to standard transport measurements, different edge equilibration regimes can be accessed in the same device. If there is a quantum point contact in the droplet, then quasiparticle properties, including braiding statistics, can be observed. Their effects are manifested as modulations of the microwave absorption spectrum that are, notably, first-order in the tunneling amplitude at the point contact.
@article{arxiv.1307.1146,
title = {Microwave Absorption by a Mesoscopic Quantum Hall Droplet},
author = {Jennifer Cano and Andrew C. Doherty and Chetan Nayak and David J. Reilly},
journal= {arXiv preprint arXiv:1307.1146},
year = {2013}
}