تقرير
Multi-field quantum conferencing overcomes the network capacity limit
| العنوان: | Multi-field quantum conferencing overcomes the network capacity limit |
|---|---|
| المؤلفون: | Xie, Yuan-Mei, Lu, Yu-Shuo, Fu, Yao, Yin, Hua-Lei, Chen, Zeng-Bing |
| سنة النشر: | 2024 |
| المجموعة: | Quantum Physics |
| مصطلحات موضوعية: | Quantum Physics |
| الوصف: | Quantum conferencing enables multiple nodes within a quantum network to share a secure group key for private message broadcasting. The key rate, however, is limited by the repeaterless capacity to distribute multiparticle entangled states across the network. Currently, in the finite-size regime, no feasible schemes utilizing existing experimental techniques can overcome the fundamental rate-distance limit of quantum conferencing in quantum networks without repeaters. Here, we propose a practical, multi-field scheme that breaks this limit, involving virtually establishing Greenberger-Horne-Zeilinger states through post-measurement coincidence matching. This proposal features a measurement-device-independent characteristic and can directly scale to support any number of users. Simulations show that the fundamental limitation on the group key rate can be overcome in a reasonable running time of sending $10^{14}$ pulses. We predict that it offers an efficient design for long-distance broadcast communication in future quantum networks. Comment: 20 pages, 6 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2407.00897 |
| رقم الأكسشن: | edsarx.2407.00897 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |