Quantum Resource Theories beyond Convexity
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arXiv
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| Auteurs principaux: | , , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866916005062639616 |
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| author | Salazar, Roberto Czartowski, Jakub Rodríguez, Ricard Ravell Rajchel-Mieldzioć, Grzegorz Horodecki, Paweł Życzkowski, Karol |
| author_facet | Salazar, Roberto Czartowski, Jakub Rodríguez, Ricard Ravell Rajchel-Mieldzioć, Grzegorz Horodecki, Paweł Życzkowski, Karol |
| contents | A class of quantum resource theories, based on non-convex star-shape sets, presented in this work captures the key quantum properties that cannot be studied by standard convex theories. We provide operational interpretations for a resource of this class and demonstrate its advantage to improve performance of correlated quantum discrimination tasks and testing of quantum combs. Proposed techniques provide useful tools to describe quantum discord, total correlations in composite quantum systems and to estimate the degree of non-Markovianity of an analyzed quantum dynamics. Other applications include the problem of unistochasticity of a given bistochastic matrix, with relevance for quantization of classical dynamics and studies of violation of CP-symmetry in high energy physics. In all these cases, the non-linear witnesses introduced here outperform the standard linear witnesses. Importance of our findings for quantum information theory is also emphasized. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_05785 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Quantum Resource Theories beyond Convexity Salazar, Roberto Czartowski, Jakub Rodríguez, Ricard Ravell Rajchel-Mieldzioć, Grzegorz Horodecki, Paweł Życzkowski, Karol Quantum Physics A class of quantum resource theories, based on non-convex star-shape sets, presented in this work captures the key quantum properties that cannot be studied by standard convex theories. We provide operational interpretations for a resource of this class and demonstrate its advantage to improve performance of correlated quantum discrimination tasks and testing of quantum combs. Proposed techniques provide useful tools to describe quantum discord, total correlations in composite quantum systems and to estimate the degree of non-Markovianity of an analyzed quantum dynamics. Other applications include the problem of unistochasticity of a given bistochastic matrix, with relevance for quantization of classical dynamics and studies of violation of CP-symmetry in high energy physics. In all these cases, the non-linear witnesses introduced here outperform the standard linear witnesses. Importance of our findings for quantum information theory is also emphasized. |
| title | Quantum Resource Theories beyond Convexity |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2405.05785 |