Long-Distance Device-Independent Conference Key Agreement
Fuente:
arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| Soggetti: | |
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| _version_ | 1866911172752572416 |
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| author | Ishihara, Makoto Bjerrum, Anders J. E. Roga, Wojciech Brask, Jonatan B. Andersen, Ulrik L. Takeoka, Masahiro |
| author_facet | Ishihara, Makoto Bjerrum, Anders J. E. Roga, Wojciech Brask, Jonatan B. Andersen, Ulrik L. Takeoka, Masahiro |
| contents | Device-independent quantum key distribution (DI-QKD) enables two remote parties to share an information-theoretically secure key without any assumptions on the inner workings of the devices used. Device-independent conference key agreement (DI-CKA) is multipartite DI-QKD where more than two parties share a common secure key. The performance of DI-CKA, however, is strictly limited because of its susceptibility to losses due e.g. to imperfect detection efficiency and channel transmission. Here, we propose a DI-CKA protocol which reduces this limitation by using a heralding scheme to distribute multipartite entanglement. We analyze key rates of our protocol for two different measurement scenarios and we show that our protocol outperforms a previous DI-CKA protocol even with an experimentally feasible measurement. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_01296 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Long-Distance Device-Independent Conference Key Agreement Ishihara, Makoto Bjerrum, Anders J. E. Roga, Wojciech Brask, Jonatan B. Andersen, Ulrik L. Takeoka, Masahiro Quantum Physics Device-independent quantum key distribution (DI-QKD) enables two remote parties to share an information-theoretically secure key without any assumptions on the inner workings of the devices used. Device-independent conference key agreement (DI-CKA) is multipartite DI-QKD where more than two parties share a common secure key. The performance of DI-CKA, however, is strictly limited because of its susceptibility to losses due e.g. to imperfect detection efficiency and channel transmission. Here, we propose a DI-CKA protocol which reduces this limitation by using a heralding scheme to distribute multipartite entanglement. We analyze key rates of our protocol for two different measurement scenarios and we show that our protocol outperforms a previous DI-CKA protocol even with an experimentally feasible measurement. |
| title | Long-Distance Device-Independent Conference Key Agreement |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2506.01296 |