Fractional Chern insulator edges: crystalline effects and optical measurements
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arXiv
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| Auteurs principaux: | , , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866911278898872320 |
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| author | Wang, Yan-Qi Motruk, Johannes Grankin, Andrey Hafezi, Mohammad |
| author_facet | Wang, Yan-Qi Motruk, Johannes Grankin, Andrey Hafezi, Mohammad |
| contents | Edge states of chiral topologically ordered phases are commonly described by chiral Luttinger liquids, effective theories that are exact only in the hydrodynamic limit. Motivated by recent bulk observations of fractional Chern insulators (FCIs) in two-dimensional materials and by synthetic realizations in ultracold atoms, we revisit this framework and quantify deviations from the hydrodynamic limit due to lattice effects. Using a combination of analytical arguments and numerical simulations, we disentangle universal from nonuniversal edge properties. We outline experimental probes in excitonic FCIs and in ultracold atom systems, and in particular propose time-resolved edge spectroscopy to directly access the predicted exponents and velocities. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_17494 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Fractional Chern insulator edges: crystalline effects and optical measurements Wang, Yan-Qi Motruk, Johannes Grankin, Andrey Hafezi, Mohammad Strongly Correlated Electrons Mesoscale and Nanoscale Physics Materials Science Quantum Gases Quantum Physics Edge states of chiral topologically ordered phases are commonly described by chiral Luttinger liquids, effective theories that are exact only in the hydrodynamic limit. Motivated by recent bulk observations of fractional Chern insulators (FCIs) in two-dimensional materials and by synthetic realizations in ultracold atoms, we revisit this framework and quantify deviations from the hydrodynamic limit due to lattice effects. Using a combination of analytical arguments and numerical simulations, we disentangle universal from nonuniversal edge properties. We outline experimental probes in excitonic FCIs and in ultracold atom systems, and in particular propose time-resolved edge spectroscopy to directly access the predicted exponents and velocities. |
| title | Fractional Chern insulator edges: crystalline effects and optical measurements |
| topic | Strongly Correlated Electrons Mesoscale and Nanoscale Physics Materials Science Quantum Gases Quantum Physics |
| url | https://arxiv.org/abs/2511.17494 |