Super-additivity of quantum capacity in simple channels
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arXiv
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| Hauptverfasser: | , , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866909629405986816 |
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| author | Wu, Zhen Zhao, Qi Ma, Zhihao |
| author_facet | Wu, Zhen Zhao, Qi Ma, Zhihao |
| contents | The super-additivity of quantum channel capacity is an important feature of quantum information theory different from classical theory, which has been attracting attention. Recently a special channel called ``platypus channel'' exhibits super-additive quantum capacity when combined with qudit erasure channels. Here we consider the ``generalized platypus channel'', prove that it has computable channel capacities, such as both private and classical capacity equal to $1$, and in particular, the generalized platypus channel still displays the super-additivity of quantum capacity when combined with qudit erasure channels and multilevel amplitude damping channels respectively. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_24661 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Super-additivity of quantum capacity in simple channels Wu, Zhen Zhao, Qi Ma, Zhihao Quantum Physics The super-additivity of quantum channel capacity is an important feature of quantum information theory different from classical theory, which has been attracting attention. Recently a special channel called ``platypus channel'' exhibits super-additive quantum capacity when combined with qudit erasure channels. Here we consider the ``generalized platypus channel'', prove that it has computable channel capacities, such as both private and classical capacity equal to $1$, and in particular, the generalized platypus channel still displays the super-additivity of quantum capacity when combined with qudit erasure channels and multilevel amplitude damping channels respectively. |
| title | Super-additivity of quantum capacity in simple channels |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2505.24661 |