title: Quasi-particle properties from tunneling in the v = 5/2 fractional quantum Hall state.
abstract: Quasi-particles with fractional charge and statistics, as well as modified Coulomb interactions, exist in a two-dimensional electron system in the fractional quantum Hall (FQH) regime. Theoretical models of the FQH state at filling fraction v = 5/2 make the further prediction that the wave function can encode the interchange of two quasi-particles, making this state relevant for topological quantum computing. We show that bias-dependent tunneling across a narrow constriction at v = 5/2 exhibits temperature scaling and, from fits to the theoretical scaling form, extract values for the effective charge and the interaction parameter of the quasi-particles. Ranges of values obtained are consistent with those predicted by certain models of the 5/2 state.
authors.affiliation: Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
authors.forename: Iuliana P
authors.initials: IP
authors.lastname: Radu
authors.forename: J B
authors.initials: JB
authors.lastname: Miller
authors.forename: C M
authors.initials: CM
authors.lastname: Marcus
authors.forename: M A
authors.initials: MA
authors.lastname: Kastner
authors.forename: L N
authors.initials: LN
authors.lastname: Pfeiffer
authors.forename: K W
authors.initials: KW
authors.lastname: West