Identifying Non-Abelian Topological Order through Minimal Entangled States

W. Zhu, S. S. Gong, F. D. M. Haldane, and D. N. Sheng
Phys. Rev. Lett. 112, 096803 – Published 4 March 2014
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Abstract

The topological order is encoded in the pattern of long-range quantum entanglements, which cannot be measured by any local observable. Here we perform an exact diagonalization study to establish the non-Abelian topological order for topological band models through entanglement entropy measurement. We focus on the quasiparticle statistics of the non-Abelian Moore-Read and Read-Rezayi states on the lattice models with bosonic particles. We identify multiple independent minimal entangled states (MESs) in the ground state manifold on a torus. The extracted modular S matrix from MESs faithfully demonstrates the Ising anyon or Fibonacci quasiparticle statistics, including the quasiparticle quantum dimensions and the fusion rules for such systems. These findings unambiguously demonstrate the topological nature of the quantum states for these flatband models without using the knowledge of model wave functions.

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  • Received 29 August 2013

DOI:https://doi.org/10.1103/PhysRevLett.112.096803

© 2014 American Physical Society

Authors & Affiliations

W. Zhu1, S. S. Gong1, F. D. M. Haldane2, and D. N. Sheng1

  • 1Department of Physics and Astronomy, California State University, Northridge, California 91330, USA
  • 2Department of Physics, Princeton University, Princeton, New Jersey 08544, USA

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Vol. 112, Iss. 9 — 7 March 2014

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