2001/06/01 by Marcus Kollar, Subir Sachdev
Physics and Astronomy · #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.65.121304
published as Physical Review B 65, 121304 (2002). · 4 pages, 1 figure
arxiv created 2001/06/01 · arxiv updated 2009/11/30
We use a method of matched asymptotics to determine the energy gap of two counter-propagating, strongly interacting, quantum Hall edge states. The microscopic edge state dispersion and Coulomb interactions are used to precisely constrain the short-distance behavior of an integrable field theory, which then determines the low energy spectrum. We discuss the relationship of our results to the tunneling measurements of Kang et al., Nature 403, 59 (2000).