Random Dirac Fermions: The su(N) Gauge Potential and Z_N Twists

Details Random Dirac Fermions: The su(N) Gauge Potential and Z_N Twists Random Dirac Fermions: The su(N) Gauge Potential and Z_N Twists

2000-12-22

arxiv.org/abs/cond-mat/0012420v1

Physics

Condensed Matter

6 pages, RevTex

Scientific paper

We obtain the disorder averaged (critical) four-point correlation functions for N species of (two-dimensional Euclidean) Dirac fermions subject to a (Gaussian) random su(N) gauge field. The replica approach and the strong disorder approach yield identical results, as one might expect in the light of recent developments in the N=2 case [1]. We establish a connection with `dressed' Z_N twist fields in the c=-2 logarithmic conformal field theory (LCFT), thereby extending the recent connection to `dressed' Z_2 twists [1,2]. We draw attention to the fact that `dressed' Z_2 twist operators have previously appeared in the description of half flux-quantum quasiholes in the bulk excitations of the Haldane--Rezayi Quantum Hall state [3].

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