Transport of fractional Hall quasiparticles through an antidot

Current statistics of an antidot in the fractional quantum Hall regime is studied for Laughlin's series. The chiral Luttinger liquid picture of edge states with a renormalized interaction exponent g is adopted. Several peculiar features are found in the sequential tunneling regime. On one side, current displays negative differential conductance and double-peak structures when g < 1. On the other side, universal sub-Poissonian transport regimes are identified through an analysis of higher current moments. A comparison between the Fano factor and skewness is proposed in order to clearly distinguish the charge of the carriers, regardless of possible nonuniversal interaction renormalizations. Super-Poissonian statistics is obtained in the shot limit for g < 1, and plasmonic effects due to the finite-size antidot are tracked.