Detecting bipartite entanglement with PnCP maps and non-negative polynomials
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arXiv
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866913170967232512 |
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| author | Massé, Gaël Rezig, Mounir Catala, Paul Scheiner, Santiago Córdoba, Laia Serradesanferm Oudot, Enky Markham, Damian |
| author_facet | Massé, Gaël Rezig, Mounir Catala, Paul Scheiner, Santiago Córdoba, Laia Serradesanferm Oudot, Enky Markham, Damian |
| contents | Positive non-Completely Positive (PnCP) maps are an essential tool to detect entanglement since their characterization is a dual aspect of the separability problem. A recent algorithm proposed by Kelp et al. explains how to generate PnCP maps based on the construction of certain positive non-Sum-of-Squares polynomials. We implement this algorithm in a numerically robust way and propose a working version on GitHub. We theoretically demonstrate that the maps produced by the algorithm are indecomposable, localized on the boundary of the positive cone and show that they are inequivalent with most other known PnCP maps. We numerically investigate their entanglement power, demonstrating notably that they are capable of detecting PPT entangled states that most criteria fail to detect. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_30426 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Detecting bipartite entanglement with PnCP maps and non-negative polynomials Massé, Gaël Rezig, Mounir Catala, Paul Scheiner, Santiago Córdoba, Laia Serradesanferm Oudot, Enky Markham, Damian Quantum Physics Positive non-Completely Positive (PnCP) maps are an essential tool to detect entanglement since their characterization is a dual aspect of the separability problem. A recent algorithm proposed by Kelp et al. explains how to generate PnCP maps based on the construction of certain positive non-Sum-of-Squares polynomials. We implement this algorithm in a numerically robust way and propose a working version on GitHub. We theoretically demonstrate that the maps produced by the algorithm are indecomposable, localized on the boundary of the positive cone and show that they are inequivalent with most other known PnCP maps. We numerically investigate their entanglement power, demonstrating notably that they are capable of detecting PPT entangled states that most criteria fail to detect. |
| title | Detecting bipartite entanglement with PnCP maps and non-negative polynomials |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2605.30426 |