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19 April 2024
 
  » arxiv » cond-mat/0407641

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Quantum Hall line junction with impurities as a multi-slit Luttinger liquid interferometer
I. Yang ; W. Kang ; L.N. Pfeiffer ; K.W. Baldwin ; K.W. West ; Eun-Ah Kim ; E. Fradkin ;
Date 23 Jul 2004
Subject Mesoscopic Systems and Quantum Hall Effect; Strongly Correlated Electrons | cond-mat.mes-hall cond-mat.str-el
AbstractWe 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 that 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 $mu$m for the phase coherence length and directly confirm the extended phase coherence of quantum Hall edge states.
Source arXiv, cond-mat/0407641
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