Phase assumption-free multiparty quantum clock synchronization
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_ | 1866918227134644224 |
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| author | Oujaa, Hatim A. Liu, Qiao Ilo-Okeke, Ebubechukwu O. Ivannikov, Valentin Dowling, Jonathan P. Byrnes, Tim |
| author_facet | Oujaa, Hatim A. Liu, Qiao Ilo-Okeke, Ebubechukwu O. Ivannikov, Valentin Dowling, Jonathan P. Byrnes, Tim |
| contents | We investigate methods to broadcast timing information from a central clock to all other clocks by the use of multipartite entanglement. This task is a necessary step in establishing a coordinated universal time, currently performed using classical synchronization methods. Using an entanglement-based method has the advantage that the timing results are independent of the intervening medium. We generalize existing bipartite quantum clock synchronization methods and take special care to address issues of different phase conventions being adopted at each node (the ``Preskill phase problem''). Using supersinglet purification, we show that this allows for a scalable method with a time signal that is a constant with respect to the number of nodes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_16895 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Phase assumption-free multiparty quantum clock synchronization Oujaa, Hatim A. Liu, Qiao Ilo-Okeke, Ebubechukwu O. Ivannikov, Valentin Dowling, Jonathan P. Byrnes, Tim Quantum Physics We investigate methods to broadcast timing information from a central clock to all other clocks by the use of multipartite entanglement. This task is a necessary step in establishing a coordinated universal time, currently performed using classical synchronization methods. Using an entanglement-based method has the advantage that the timing results are independent of the intervening medium. We generalize existing bipartite quantum clock synchronization methods and take special care to address issues of different phase conventions being adopted at each node (the ``Preskill phase problem''). Using supersinglet purification, we show that this allows for a scalable method with a time signal that is a constant with respect to the number of nodes. |
| title | Phase assumption-free multiparty quantum clock synchronization |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2510.16895 |