Strong-disorder renormalization for interacting non-Abelian anyon systems in two dimensions

C. R. Laumann, D. A. Huse, A. W.W. Ludwig, G. Refael, S. Trebst, M. Troyer

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

We consider the effect of quenched spatial disorder on systems of interacting, pinned non-Abelian anyons as might arise in disordered Hall samples at filling fractions ν=5/2 or ν=12/5. In one spatial dimension, such disordered anyon models have previously been shown to exhibit a hierarchy of infinite randomness phases. Here, we address systems in two spatial dimensions and report on the behavior of Ising and Fibonacci anyons under the numerical strong-disorder renormalization group (SDRG). In order to manage the topology-dependent interactions generated during the flow, we introduce a planar approximation to the SDRG treatment. We characterize this planar approximation by studying the flow of disordered hard-core bosons and the transverse field Ising model, where it successfully reproduces the known infinite randomness critical point with exponent ψ 0.49. Our main conclusion for disordered anyon models in two spatial dimensions is that systems of Ising anyons as well as systems of Fibonacci anyons do not realize infinite randomness phases, but flow back to weaker disorder under the numerical SDRG treatment.

Original languageEnglish (US)
Article number224201
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume85
Issue number22
DOIs
StatePublished - Jun 5 2012

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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