Quantum dynamical signatures of non-Hermitian boundary modes
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866908414575116288 |
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| author | Yang, Fan Zelenayova, Maria Molignini, Paolo Bergholtz, Emil J. |
| author_facet | Yang, Fan Zelenayova, Maria Molignini, Paolo Bergholtz, Emil J. |
| contents | The non-Hermitian bulk-boundary correspondence features an interplay between the non-Hermitian skin effect and anomalous boundary-mode behavior. Whereas the skin effect is known to manifest itself in quantum dynamics in the form of chiral damping, it has remained less clear what impact the boundary modes may have. Here we derive experimentally accessible signatures of the boundary modes. We also establish clear criteria, based on the effective generalized Brillouin zone, that determine when bulk and boundary effects can be dynamically discerned using the Liouvillian separation gap. This leads to telltale signatures in both stable regimes -- where particle number remains finite -- and in the unstable regimes -- where a macroscopic boundary mode population occurs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_16308 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quantum dynamical signatures of non-Hermitian boundary modes Yang, Fan Zelenayova, Maria Molignini, Paolo Bergholtz, Emil J. Mesoscale and Nanoscale Physics Quantum Gases Optics Quantum Physics The non-Hermitian bulk-boundary correspondence features an interplay between the non-Hermitian skin effect and anomalous boundary-mode behavior. Whereas the skin effect is known to manifest itself in quantum dynamics in the form of chiral damping, it has remained less clear what impact the boundary modes may have. Here we derive experimentally accessible signatures of the boundary modes. We also establish clear criteria, based on the effective generalized Brillouin zone, that determine when bulk and boundary effects can be dynamically discerned using the Liouvillian separation gap. This leads to telltale signatures in both stable regimes -- where particle number remains finite -- and in the unstable regimes -- where a macroscopic boundary mode population occurs. |
| title | Quantum dynamical signatures of non-Hermitian boundary modes |
| topic | Mesoscale and Nanoscale Physics Quantum Gases Optics Quantum Physics |
| url | https://arxiv.org/abs/2506.16308 |