Abstract
We report on quantum interference between a pair of counterpropagating quantum Hall edge states that are separated by a high-quality tunnel barrier. Observed Aharonov-Bohm oscillations are analyzed in terms of resonant tunneling between coupled Luttinger liquids which creates bound electronic states between pairs of tunnel centers that act like interference slits. We place a lower bound in the range of 20-40 μm for the phase coherence length and directly confirm the extended phase coherence of quantum Hall edge states.
Original language | English |
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Article number | 113312 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 71 |
Issue number | 11 |
DOIs | |
State | Published - 15 Mar 2005 |