Signatures of Fractional Exclusion Statistics in the Spectroscopy of   Quantum Hall Droplets
  We show how spectroscopic experiments on a small Laughlin droplet of rotating bosons can directly demonstrate Haldane fractional exclusion statistics of quasihole excitations. The characteristic signatures appear in the single-particle excitation spectrum. We show that the transitions are governed by a "many-body selection rule" which allows one to relate the number of allowed transitions to the number of quasihole states on a finite geometry. We illustrate the theory with numerically exact simulations of small numbers of particles. 
Nigel R. Cooper and Steven H. Simon
cond-mat.quant-gas cond-mat.mes-hall