Abstract
We report experiments on resonant tunneling through a quantum antidot in the fractional quantum Hall regime. The envelope of the conductance peaks indicates tunneling via two resonant states, one of them bound on the lithographic antidot, the other on a hill of the disorder potential. Moreover, our analysis indicates that the coherent tunneling rate between the two states is an order of magnitude higher than the phase breaking rate, thus giving evidence for a coherently coupled "antidot molecule."
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