We propose tunnel junctions of a Hall bar and a superconducting lead, for observing Cooper-pair tunneling into singlet fractional quantum Hall edge states. These tunnel junctions provide a natural means of extracting precise information of the spin polarization and the filling factor of the state. The low energy regime of one of the set-ups is governed by a novel quantum entangled fixed point.
@article{arxiv.cond-mat/0405156,
title = {Cooper pair tunneling in junctions of singlet quantum Hall states and superconductors},
author = {Eun-Ah Kim and Smitha Vishveshwara and Eduardo Fradkin},
journal= {arXiv preprint arXiv:cond-mat/0405156},
year = {2009}
}
Comments
4 pages, 1 figure (3 subfigures); new title and abstract; new discussion of the quantum entangled fixed point; final manuscript as published