Topological Entanglement in Abelian and non-Abelian Excitation Eigenstates

Details Topological Entanglement in Abelian and non-Abelian Excitation Eigenstates Topological Entanglement in Abelian and non-Abelian Excitation Eigenstates

2010-08-30

arxiv.org/abs/1008.5087v2

Phys. Rev. Lett. 106, 056801 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 7 figures

Scientific paper

10.1103/PhysRevLett.106.056801

Entanglement in topological phases of matter has so far been investigated through the perspective of their ground-state wave functions. In contrast, we demonstrate that the \emph{excitations} of fractional quantum Hall (FQH) systems also contain information to identify the system's topological order. Entanglement spectrum of the FQH quasihole (QH) excitations is shown to differentiate between the conformal field theory (CFT) sectors, based on the relative position of the QH with respect to the entanglement cut. For Read-Rezayi model states, as well as Coulomb interaction eigenstates, the counting of the QH entanglement levels in the thermodynamic limit matches exactly the CFT counting, and sector changes occur as non-Abelian quasiholes successively cross the entanglement cut.

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