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| Autori principali: | , , , , , |
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| Natura: | Preprint |
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2025
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| Accesso online: | https://arxiv.org/abs/2512.15655 |
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| _version_ | 1866910189029949440 |
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| author | Valdivieso, Ignacio Salinas Gondret, Victor S., Gerd Hartmann Uria, Mariano Solano, Pablo Hermann-Avigliano, Carla |
| author_facet | Valdivieso, Ignacio Salinas Gondret, Victor S., Gerd Hartmann Uria, Mariano Solano, Pablo Hermann-Avigliano, Carla |
| contents | Non-Gaussian quantum states of light are essential resources for quantum information processing and precision metrology. Among them, generalized coherent states (GCS), which naturally arise from the evolution of a coherent state with a nonlinear medium, exhibit useful quantum features such as Wigner negativity and metrological advantages [Phys. Rev. Res. 5, 013165 (2023)]. Because these states remain coherent to all orders, their nonclassical character cannot be revealed through standard intensity-intensity correlation measurements. Here, we demonstrate that the intensity-field correlation function alone provides a simple and experimentally accessible witness of nonclassicality. For GCSs, any deviation of this normalized correlation from unity signals nonclassical behavior. We derive analytical results for Kerr-generated states and extend the analysis to statistical mixtures of GCSs. The proposed approach enables real-time, low-complexity detection of quantum signatures in non-Gaussian states, offering a practical tool for experiments across a broad range of nonlinear regimes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_15655 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Characterization of Generalized Coherent States through Intensity-Field Correlations Valdivieso, Ignacio Salinas Gondret, Victor S., Gerd Hartmann Uria, Mariano Solano, Pablo Hermann-Avigliano, Carla Quantum Physics Non-Gaussian quantum states of light are essential resources for quantum information processing and precision metrology. Among them, generalized coherent states (GCS), which naturally arise from the evolution of a coherent state with a nonlinear medium, exhibit useful quantum features such as Wigner negativity and metrological advantages [Phys. Rev. Res. 5, 013165 (2023)]. Because these states remain coherent to all orders, their nonclassical character cannot be revealed through standard intensity-intensity correlation measurements. Here, we demonstrate that the intensity-field correlation function alone provides a simple and experimentally accessible witness of nonclassicality. For GCSs, any deviation of this normalized correlation from unity signals nonclassical behavior. We derive analytical results for Kerr-generated states and extend the analysis to statistical mixtures of GCSs. The proposed approach enables real-time, low-complexity detection of quantum signatures in non-Gaussian states, offering a practical tool for experiments across a broad range of nonlinear regimes. |
| title | Characterization of Generalized Coherent States through Intensity-Field Correlations |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2512.15655 |