Probing non-Abelian statistics inν=12/5quantum Hall state

Abstract

The tunneling current and shot noise of the current between two Fractional Quantum Hall (FQH) edges in the $ \nu=12/5 $ FQH state in electronic Mach-Zehnder interferometer are studied. It is shown that the tunneling current and shot noise can be used to probe the existence of $k=3 $ parafermion statistics in the $ \nu=12/5 $ FQH state. More specifically, the dependence of the current on the Aharonov-Bohm flux in the Read-Rezayi state is asymmetric under the change of the sign of the applied voltage. This property is absent in the Abelian Laughlin states. Moreover the Fano factor can exceed 12.7 electron charges in the $ \nu=12/5 $ FQH state . This number well exceeds the maximum possible Fano factor in all Laughlin states and the $ \nu=5/2 $ Moore-Read state which was shown previously to be $ e $ and $ 3.2 e $ respectively.