Signatures of fractional statistics in noise experiments in quantum Hall fluids

Abstract

The elementary excitations of fractional quantum Hall (FQH) fluids are vortices with fractional statistics. Yet, this fundamental prediction has remained an open experimental challenge. Here we show that the cross current noise in a three-terminal tunneling experiment of a two dimensional electron gas in the FQH regime can be used to detect directly the statistical angle of the excitations of these topological quantum fluids. We show that the noise also reveals signatures of exclusion statistics and of fractional charge. The vortices of Laughlin states should exhibit a ``bunching'' effect, while for higher states in the Jain sequences they should exhibit an ``anti-bunching'' effect.

4 pages 1 table, 3 figures; edited manuscript; some references added

References in corpus (1)

• Topologically-Protected Qubits from a Possible Non-Abelian Fractional Quantum Hall State

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