Coupled Wire Model of Z<sub>2 </sub>× Z<sub>2</sub><i> </i>Orbifold Quantum Hall States

ORAL

Abstract

We construct a coupled wire model for a sequence of non-Abelian quantum Hall states occurring at filling factors ν=2/(2M+q) with integers M and even(odd) integers q for fermionic(bosonic) states. They are termed Z2 × Z2 orbifold states, which have a topological order with a neutral sector described by the c=1 orbifold conformal field theory (CFT) at radius R2=p/2 with even integers p. When p=2, the state can be viewed as two decoupled layers of Moore-Read (MR) state, whose neutral sector is described by the Ising × Ising CFT and contains a Z2 × Z2 fusion subalgebra. We demonstrate that orbifold states with p > 2, also containing a Z2 × Z2 fusion algebra, can be obtained by coupling an array of MR × MR wires together through local interactions. The corresponding charge spectrum of quasiparticles is also examined. The orbifold states constructed here are complementary to the Z4 orbifold states, whose neutral edge theory is described by orbifold CFT with odd integer p and contains a Z4 fusion algebra.

*This work is in part supported by the Croucher Scholarship for Doctoral Study from the Croucher Foundation (PMT), grant EP/S020527/1 from EPSRC (YH) and a Simons Investigator grant from the Simons Foundation (CLK).

Presenters

  • Pok Man Tam

    • Physics and Astronomy, University of Pennsylvania

Authors

  • Pok Man Tam

    • Physics and Astronomy, University of Pennsylvania
  • Yichen Hu

    • Physics, University of Oxford
  • Charles L Kane

    • Physics and Astronomy, University of Pennsylvania