2014/11/17 by Curt von Keyserlingk, C. W. von Keyserlingk, Steven H. Simon +2
Materials Science · Physics and Astronomy · #Condensed matter physics #Coulomb #Coupling (piping) #Electron #Graphene research and applications #MAJORANA #Order (exchange) #Physics #Quantum Hall effect #Quantum and electron transport phenomena #Quantum mechanics #Quantum tunnelling #Superconductivity #Topological Materials and Phenomena #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.115.126807
published as Phys. Rev. Lett. 115, 126807 (2015)
arxiv created 2014/11/17 · openalex publication_date 2015/09/18 · arxiv updated 2015/09/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.