Unexpected tunneling current from downstream neutral modes

Abstract

We analyze transport through a quantum point contact in fractional quantum Hall states with counter-propagating neutral edge modes. We show that both the noise (as expected and previously calculated by other authors) and (perhaps surprisingly) the average transmitted current are affected by downstream perturbations within the standard edge state model. We consider two different scenarios for downstream perturbations. We argue that the change in transmitted current should be observable in experiments that have observed increased noise.

Added one reference, a footnote, and a couple sentences

References in corpus (6)

• Observation of neutral modes in the fractional quantum Hall regime
• Extracting net current from an upstream neutral mode in the fractional quantum Hall regime
• Thermoelectric probe for neutral edge modes in the fractional quantum Hall regime
• Charge-statistics separation and probing non-Abelian states
• Probing the neutral edge modes in transport across a point contact via thermal effects in the Read-Rezayi non-abelian quantum Hall states
• Effect of interactions on the noise of chiral Luttinger liquid systems