Cooper pair tunneling in junctions of singlet quantum Hall states and   superconductors
  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. 
Eun-Ah Kim (UIUC), Smitha Vishveshwara (UIUC) and Eduardo Fradkin   (UIUC)