Extracting the Anyonic Exchange Phase from Hanbury Brown-Twiss Correlations
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866915862817013760 |
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| author | Puster, Felix Thamm, Matthias Rosenow, Bernd |
| author_facet | Puster, Felix Thamm, Matthias Rosenow, Bernd |
| contents | In recent years, interferometry experiments in fractional quantum Hall devices have reported signatures of a fractional braiding phase for quasiparticles. It was noted, however, that the braiding phase alone does not uniquely determine the exchange phase because of a $π$-ambiguity. Here we analyze a Hanbury Brown-Twiss interferometer in a cross geometry that provides direct access to the fractional exchange phase. Using a non-equilibrium Keldysh calculation in an experimentally relevant regime, we show that the exchange phase can be obtained as the phase shift between Aharonov-Bohm oscillations in a single-particle interference current and those in the current cross-correlation arising from two-particle interference. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2603_13898 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Extracting the Anyonic Exchange Phase from Hanbury Brown-Twiss Correlations Puster, Felix Thamm, Matthias Rosenow, Bernd Mesoscale and Nanoscale Physics Strongly Correlated Electrons In recent years, interferometry experiments in fractional quantum Hall devices have reported signatures of a fractional braiding phase for quasiparticles. It was noted, however, that the braiding phase alone does not uniquely determine the exchange phase because of a $π$-ambiguity. Here we analyze a Hanbury Brown-Twiss interferometer in a cross geometry that provides direct access to the fractional exchange phase. Using a non-equilibrium Keldysh calculation in an experimentally relevant regime, we show that the exchange phase can be obtained as the phase shift between Aharonov-Bohm oscillations in a single-particle interference current and those in the current cross-correlation arising from two-particle interference. |
| title | Extracting the Anyonic Exchange Phase from Hanbury Brown-Twiss Correlations |
| topic | Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2603.13898 |