Tight Trade-off Between Internal, Assisted, and External Entanglement
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
| Veröffentlicht: |
2026
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| _version_ | 1866918455427465216 |
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| author | Gao, Limin Wang, Chenxiao |
| author_facet | Gao, Limin Wang, Chenxiao |
| contents | We derive a tight and saturable monogamy relation for three-qubit pure states that bounds the sum of concurrence and concurrence of assistance by the entanglement with an external qubit. The bound decreases strictly with increasing external entanglement, establishing a precise trade-off between internal and environment-induced entanglement. Equivalent formulations in terms of negativity and its convex-roof extensions follow. Our result provides a unified and quantitative constraint on entanglement distribution in open multipartite quantum systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_17867 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Tight Trade-off Between Internal, Assisted, and External Entanglement Gao, Limin Wang, Chenxiao Quantum Physics We derive a tight and saturable monogamy relation for three-qubit pure states that bounds the sum of concurrence and concurrence of assistance by the entanglement with an external qubit. The bound decreases strictly with increasing external entanglement, establishing a precise trade-off between internal and environment-induced entanglement. Equivalent formulations in terms of negativity and its convex-roof extensions follow. Our result provides a unified and quantitative constraint on entanglement distribution in open multipartite quantum systems. |
| title | Tight Trade-off Between Internal, Assisted, and External Entanglement |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2604.17867 |