Shot noise signatures of candidate states for the fractional quantum Hall $\nu =12/5$ state

Abstract

Fractional quantum Hall (FQH) states are highly sought after because of their ability to host non-abelian anyons, whose braiding statistics make them excellent candidates for qubits in topological quantum computing. Multiple theoretical studies on the $\nu =\frac{12}{5}$ FQH state predict various quasi-particle states hosted by the $\frac{12}{5}$ plateau, which include ${\mathbb{Z}}_3$ parafermions and Majorana modes. In this work, we provide a systematic protocol to distinguish among four possible candidate wavefunctions of the $\frac{12}{5}$ plateau using zero-frequency shot noise experiments on a filter-geometry. Qualitative comparisons of Fano-Factors provide a robust way to predict the candidate state across both the full and partial thermal equilibration regimes without prior knowledge of the experimental information, like thermal equilibration length, to allow for more realistic experiments.

3 figures, 1 table, 9 pages

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