Can Quasi-Particles Tunnel Through A Barrier?

Details Can Quasi-Particles Tunnel Through A Barrier? Can Quasi-Particles Tunnel Through A Barrier?

2004-06-20

arxiv.org/abs/cond-mat/0406452v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures, The Moriond proceedings (2004)

Scientific paper

This is a qualitative description of a systematic analysis carried out by us. We address the question of whether fractionally charged particles, in the context of the fractional quantum Hall effect (FQHE) can tunnel through a potential barrier (around which the density of the quantum Hall liquid is practically zero). Setting the barrier in a multiply-connected FQHE geometry removes the "global constraint" which prohibits such tunnelling. We have performed a microscopic analysis of adiabatic charge pumping and tunnelling in a torus geometry. Below we summarize our analysis in semi-qualitative terms. We also propose a setup-- different from the torus geometry-- amenable to experimental verification.

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