Modular non-Hermitian topology and its application to critical sensing
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arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866916058120585216 |
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| author | Sarkar, Saubhik Mukhopadhyay, Chiranjib Bayat, Abolfazl |
| author_facet | Sarkar, Saubhik Mukhopadhyay, Chiranjib Bayat, Abolfazl |
| contents | Non-Hermitian topological systems have attracted a lot of research activities in recent times, both theoretically and experimentally, due to their unique physical properties and association with open quantum systems. We show that modular structures, where specific couplings at regular intervals take distinct values, enrich the unique topological attributes of these systems such as the non-Hermitian skin effect and the breakdown of conventional bulk-boundary correspondence. These systems also possess the capability of displaying criticality-enhanced sensitivity for precision metrology. We establish how the modular structure enhances their sensing performance near spectral topological phase transitions and show that the enhancement can be achieved in multi-parameter estimation scenarios as well. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_29173 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Modular non-Hermitian topology and its application to critical sensing Sarkar, Saubhik Mukhopadhyay, Chiranjib Bayat, Abolfazl Quantum Physics Strongly Correlated Electrons Non-Hermitian topological systems have attracted a lot of research activities in recent times, both theoretically and experimentally, due to their unique physical properties and association with open quantum systems. We show that modular structures, where specific couplings at regular intervals take distinct values, enrich the unique topological attributes of these systems such as the non-Hermitian skin effect and the breakdown of conventional bulk-boundary correspondence. These systems also possess the capability of displaying criticality-enhanced sensitivity for precision metrology. We establish how the modular structure enhances their sensing performance near spectral topological phase transitions and show that the enhancement can be achieved in multi-parameter estimation scenarios as well. |
| title | Modular non-Hermitian topology and its application to critical sensing |
| topic | Quantum Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2605.29173 |