Squeezing enhanced sensing at an exceptional point
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arXiv
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| Hauptverfasser: | , , , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866917536971358208 |
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| author | Wang, Changqing Hu, Deyuan Zorzetti, Silvia Grassellino, Anna Romanenko, Alexander Zhang, Zheshen |
| author_facet | Wang, Changqing Hu, Deyuan Zorzetti, Silvia Grassellino, Anna Romanenko, Alexander Zhang, Zheshen |
| contents | Pushing the boundaries of measurement precision is central for sensing and metrology, pursued by nonclassical resources such as squeezing, and non-Hermitian degeneracies with distinct spectral response. Their convergence, however, remains challenging. We find extraordinary enhancement of sensitivity by unifying both effects in a general framework for quantum sensing in open systems. At the parametric oscillation threshold and an exceptional point, the sensing precision exhibits a unique quartic scaling with the perturbation strength. The result generalizes to multimode squeezed-state sensors with higher-order exceptional points catered to various quantum sensing platforms. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_17961 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Squeezing enhanced sensing at an exceptional point Wang, Changqing Hu, Deyuan Zorzetti, Silvia Grassellino, Anna Romanenko, Alexander Zhang, Zheshen Quantum Physics Applied Physics Pushing the boundaries of measurement precision is central for sensing and metrology, pursued by nonclassical resources such as squeezing, and non-Hermitian degeneracies with distinct spectral response. Their convergence, however, remains challenging. We find extraordinary enhancement of sensitivity by unifying both effects in a general framework for quantum sensing in open systems. At the parametric oscillation threshold and an exceptional point, the sensing precision exhibits a unique quartic scaling with the perturbation strength. The result generalizes to multimode squeezed-state sensors with higher-order exceptional points catered to various quantum sensing platforms. |
| title | Squeezing enhanced sensing at an exceptional point |
| topic | Quantum Physics Applied Physics |
| url | https://arxiv.org/abs/2507.17961 |