Multi-field quantum conferencing overcomes the network capacity limit
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866909448286502912 |
|---|---|
| author | Xie, Yuan-Mei Lu, Yu-Shuo Fu, Yao Yin, Hua-Lei Chen, Zeng-Bing |
| author_facet | Xie, Yuan-Mei Lu, Yu-Shuo Fu, Yao Yin, Hua-Lei Chen, Zeng-Bing |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_00897 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Multi-field quantum conferencing overcomes the network capacity limit Xie, Yuan-Mei Lu, Yu-Shuo Fu, Yao Yin, Hua-Lei Chen, Zeng-Bing Quantum Physics 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. |
| title | Multi-field quantum conferencing overcomes the network capacity limit |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2407.00897 |