Detection of mode-intrinsic quantum entanglement
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866911967262801920 |
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| author | Lopetegui, Carlos E. Isoard, Mathieu Treps, Nicolas Walschaers, Mattia |
| author_facet | Lopetegui, Carlos E. Isoard, Mathieu Treps, Nicolas Walschaers, Mattia |
| contents | Quantum correlations are at the core of the power of quantum information and are necessary to reach a quantum computational advantage. In the context of continuous-variable quantum systems, another necessary ressource for quantum advantages is non-Gaussianity. In this work, we propose a witness, based on previously known relations between metrological power and quantum correlations, to detect a strong form of entanglement that only non-Gaussian states possess and that cannot be undone by passive optical operations, i.e., entanglement in all mode bases. The strength of our witness is two-fold: it only requires measurements in one basis to check entanglement in any arbitrary mode basis; it can be made applicable experimentally using homodyne measurements and without requiring a full tomography of the state. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_18095 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Detection of mode-intrinsic quantum entanglement Lopetegui, Carlos E. Isoard, Mathieu Treps, Nicolas Walschaers, Mattia Quantum Physics Quantum correlations are at the core of the power of quantum information and are necessary to reach a quantum computational advantage. In the context of continuous-variable quantum systems, another necessary ressource for quantum advantages is non-Gaussianity. In this work, we propose a witness, based on previously known relations between metrological power and quantum correlations, to detect a strong form of entanglement that only non-Gaussian states possess and that cannot be undone by passive optical operations, i.e., entanglement in all mode bases. The strength of our witness is two-fold: it only requires measurements in one basis to check entanglement in any arbitrary mode basis; it can be made applicable experimentally using homodyne measurements and without requiring a full tomography of the state. |
| title | Detection of mode-intrinsic quantum entanglement |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2407.18095 |