Observation of non-Hermitian bulk-boundary correspondence in non-chiral non-unitary quantum dynamics of single photons
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arXiv
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| Autori principali: | , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866908304955932672 |
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| author | Zhang, Miao Zhang, Yue Li, Shuai Tian, Rui Wu, Tianhao Xu, Yingchao Li, Yi-an Wei, Yuanbang Gao, Hong Zubairy, M. Suhail Li, Fuli Liu, Bo |
| author_facet | Zhang, Miao Zhang, Yue Li, Shuai Tian, Rui Wu, Tianhao Xu, Yingchao Li, Yi-an Wei, Yuanbang Gao, Hong Zubairy, M. Suhail Li, Fuli Liu, Bo |
| contents | The breakdown of conventional bulk-boundary correspondence, a cornerstone of topological physics, is one of counter-intuitive phenomena in non-Hermitian systems, that is deeply rooted in symmetry. In particular, preserved chiral symmetry is one of the key ingredients, which plays a pivotal role in determining non-Hermitian topology. Nevertheless, chiral symmetry breaking in non-Hermitian systems disrupts topological protection, modifies topological invariants, and substantially reshapes spectral and edge-state behavior. The corresponding fundamentally important bulk-boundary correspondence thus needs to be drastically reconstructed. However, it has so far eluded experimental efforts. Here, we theoretically predict and experimentally demonstrate the bulk-boundary correspondence of a one-dimensional (1D) non-Hermitian system with chiral symmetry breaking in discrete-time non-chiral non-unitary quantum walks of single photons. Through constructing a domain-wall configuration, we experimentally observe the photon localization at the interface of domain-wall structure, clearly indicating the presence of the topological edge mode. The appearance of that matches excellently with the prediction of our introduced non-chiral non-Bloch topological invariants pair. Our work thus unequivocally builds the non-Hermitian bulk-boundary correspondence as a general principle for studying topological physics in non-Hermitian systems with chiral symmetry breaking. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_04882 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Observation of non-Hermitian bulk-boundary correspondence in non-chiral non-unitary quantum dynamics of single photons Zhang, Miao Zhang, Yue Li, Shuai Tian, Rui Wu, Tianhao Xu, Yingchao Li, Yi-an Wei, Yuanbang Gao, Hong Zubairy, M. Suhail Li, Fuli Liu, Bo Mesoscale and Nanoscale Physics Quantum Gases Optics Quantum Physics The breakdown of conventional bulk-boundary correspondence, a cornerstone of topological physics, is one of counter-intuitive phenomena in non-Hermitian systems, that is deeply rooted in symmetry. In particular, preserved chiral symmetry is one of the key ingredients, which plays a pivotal role in determining non-Hermitian topology. Nevertheless, chiral symmetry breaking in non-Hermitian systems disrupts topological protection, modifies topological invariants, and substantially reshapes spectral and edge-state behavior. The corresponding fundamentally important bulk-boundary correspondence thus needs to be drastically reconstructed. However, it has so far eluded experimental efforts. Here, we theoretically predict and experimentally demonstrate the bulk-boundary correspondence of a one-dimensional (1D) non-Hermitian system with chiral symmetry breaking in discrete-time non-chiral non-unitary quantum walks of single photons. Through constructing a domain-wall configuration, we experimentally observe the photon localization at the interface of domain-wall structure, clearly indicating the presence of the topological edge mode. The appearance of that matches excellently with the prediction of our introduced non-chiral non-Bloch topological invariants pair. Our work thus unequivocally builds the non-Hermitian bulk-boundary correspondence as a general principle for studying topological physics in non-Hermitian systems with chiral symmetry breaking. |
| title | Observation of non-Hermitian bulk-boundary correspondence in non-chiral non-unitary quantum dynamics of single photons |
| topic | Mesoscale and Nanoscale Physics Quantum Gases Optics Quantum Physics |
| url | https://arxiv.org/abs/2504.04882 |