Abstract
We study nonequilibrium edge state transport in the fractional quantum Hall regime at filling g=1/m. Tunneling of Laughlin quasiparticles between edges is shown to generate both current and voltage shot noise with a universal ratio of noise amplitudes given by (/h. In the weak backscattering limit we predict a current shot noise satisfying Poisson statistics with charge ge, which should enable a direct measurement of the fractional charge of the quasiparticle. On resonance the quasiparticles tunnel in pairs and the effective charge entering the current shot noise becomes 2ge.
- Received 14 June 1993
DOI:https://doi.org/10.1103/PhysRevLett.72.724
©1994 American Physical Society