| Title: |
Slow Quasiparticle Dynamics and Anyonic Statistics in a Fractional Quantum Hall Fabry-Pérot Interferometer |
| Authors: |
Samuelson, Noah L.; Cohen, Liam A.; Wang, Will; Blanch, Simon; Taniguchi, Takashi; Watanabe, Kenji; Zaletel, Michael P.; Young, Andrea F. |
| Contributors: |
Office of Naval Research; Air Force Office of Scientific Research; Army Research Office; U.S. Department of Energy; Office of Science; Basic Energy Sciences; Division of Materials Sciences and Engineering; Japan Society for the Promotion of Science; Theory of Materials program; Brown Investigator Award |
| Source: |
Physical Review X ; volume 16, issue 1 ; ISSN 2160-3308 |
| Publisher Information: |
American Physical Society (APS) |
| Publication Year: |
2026 |
| Description: |
Anyons are two-dimensional particles with fractional exchange statistics that emerge as elementary excitations of fractional quantum Hall phases. Experimentally, their exchange statistics can be measured in the edge-state Fabry-Pérot interferometer, wherein the presence of localized anyons contributes a phase to the interference pattern where is twice the exchange phase. Here we report the observation of large, hysteretic phase jumps in a monolayer graphene Fabry-Pérot interferometer at . When the filling factor is increased from toward the center of the plateau, we observe phase slips with magnitude , consistent with the addition of individual quasiparticles to the interferometer bulk. These phase slips occur as instantaneous jumps in the interference signal, with intervals between the jumps indicating quasiparticle equilibration times exceeding 20 min. We use this long timescale to investigate the effect of changes in interferometer area and independently at fixed magnetic field, revealing a striking memory effect in the phase slip magnitude. In particular, as the plateau is approached from higher filling, we observed phase slips with significantly larger than over the same range of gate voltage where quantized jumps are seen for increasing . We discuss this asymmetry in terms of bulk-edge coupling of quasiparticles localized near the edge or in the bulk, and argue that this effect can be qualitatively reconciled with theoretical expectations for strongly interacting quasiparticles in the presence of weak disorder and strongly nonequilibrium charge dynamics. Besides providing a replication of interferometric measurements sensitive to θ a , our results highlight the key role played by charge dynamics on signatures of the anyon phase, and demonstrate that fractional quasiparticles can be indefinitely localized in nonequilibrium configurations. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1103/fwjg-mx9h |
| DOI: |
10.1103/fwjg-mx9h/fulltext |
| Availability: |
https://doi.org/10.1103/fwjg-mx9h; https://link.aps.org/article/10.1103/fwjg-mx9h; http://harvest.aps.org/v2/journals/articles/10.1103/fwjg-mx9h/fulltext |
| Rights: |
https://creativecommons.org/licenses/by/4.0/ |
| Accession Number: |
edsbas.C62788FE |
| Database: |
BASE |