Enhanced Bulk-Edge Coulomb Coupling in Fractional Fabry-Perot Interferometers

Curt Von Keyserlingk, S. H. Simon, Bernd Rosenow

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


Recent experiments use Fabry-Perot (FP) interferometry to claim that the ν=5/2 quantum Hall state exhibits non-Abelian topological order. We note that the experiments appear inconsistent with a model neglecting bulk-edge Coulomb coupling and Majorana tunneling, so we reexamine the theory of FP devices. Even a moderate Coulomb coupling may strongly affect some fractional plateaus, but very weakly affect others, allowing us to model the data over a wide range of plateaus. While experiments are consistent with the ν=5/2 state harboring Moore-Read topological order, they may have measured Coulomb effects rather than an "even-odd effect" due to non-Abelian braiding.

Original languageEnglish
Article number126807
Number of pages5
JournalPhysical Review Letters
Issue number12
Publication statusPublished - 18 Sept 2015

ASJC Scopus subject areas

  • General Physics and Astronomy


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