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    Shot noise signatures of candidate states for the fractional quantum Hall ν=125 state

    Goutham Vinjamuri1,* and Ankur Das2,†

    • *Contact author: vinjamuri21@iiserb.ac.in
    • †Contact author: ankur@labs.iisertirupati.ac.in

    Phys. Rev. B 112, 155117 – Published 7 October, 2025

    DOI: https://doi.org/10.1103/tp7s-nf8b

    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 ν=125 FQH state predict various quasiparticle states hosted by the 125 plateau, which include Z3 parafermions and Majorana modes. In this work, we provide a systematic protocol to distinguish among four possible candidate wavefunctions of the 125 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, such as thermal equilibration length, allowing for more realistic experiments.

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