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Non-Abelian phases in two-component ν=2/3 fractional quantum Hall states: Emergence of Fibonacci anyons

Cornell Affiliated Author(s)

Author

Z. Liu
A. Vaezi
K. Lee
Eun-Ah Kim

Abstract

Recent theoretical insights into the possibility of non-Abelian phases in ν=2/3 fractional quantum Hall states revived the interest in the numerical phase diagram of the problem. We investigate the effect of various kinds of two-body interlayer couplings on the (330) bilayer state and exactly solve the Hamiltonian for up to 14 electrons on sphere and torus geometries. We consider interlayer tunneling, short-ranged repulsive/attractive pseudopotential interactions, and Coulomb repulsion. We find a 6-fold ground-state degeneracy on the torus when the interlayer hollow-core interaction is dominant. To identify the topological nature of this phase we measure the orbital-cut entanglement spectrum, quasihole counting, topological entanglement entropy, and wave-function overlap. Comparing the numerical results to the theoretical predictions, we interpret this 6-fold ground-state degeneracy phase to be the non-Abelian bilayer Fibonacci state. © 2015 American Physical Society.

Date Published

Journal

Physical Review B - Condensed Matter and Materials Physics

Volume

92

Issue

8

URL

https://www.scopus.com/inward/record.uri?eid=2-s2.0-84940063702&doi=10.1103%2fPhysRevB.92.081102&partnerID=40&md5=7d0b9a3a82f0440af2633ff0b692535c

DOI

10.1103/PhysRevB.92.081102

Group (Lab)

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