Edge-Induced Qubit Polarization in Systems with Ising Anyons

Details Edge-Induced Qubit Polarization in Systems with Ising Anyons Edge-Induced Qubit Polarization in Systems with Ising Anyons

2011-02-10

arxiv.org/abs/1102.2016v1

New J. Phys. 13, 055005 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

12 pages, 2 figures. Submitted to New Journal of Physics

Scientific paper

10.1088/1367-2630/13/5/055005

We investigate the proposed experimental setup for measuring the topological charge in a an Ising anyon system by means of Fabry-P\'erot interferometry with a chiral edge state. We show that such an interferometer has the unintended but not necessarily unwelcome effect of stabilizing the state of the system being measured (i.e., a topological qubit). We show further that interactions between the edge mode and the localized bulk quasiparticles can have the effect of polarizing the qubit, stabilizing its state. We discuss the these results in the context of recent interferometer experiments in the 5/2 fractional quantum Hall state, where the first of these effects is small, but the second may be relevant to the observed phenomena.

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