A reconfigurable entanglement distribution network suitable for connecting multiple ground nodes with a satellite
- URL: http://arxiv.org/abs/2406.13916v1
- Date: Thu, 20 Jun 2024 01:16:23 GMT
- Title: A reconfigurable entanglement distribution network suitable for connecting multiple ground nodes with a satellite
- Authors: Stéphane Vinet, Ramy Tannous, Thomas Jennewein,
- Abstract summary: We propose a network with dual-functionality: during a brief satellite pass, the ground network is configured as a multipoint-to-point topology.
During times when this satellite is not available, the satellite up-link is rerouted via a single optical switch to the ground nodes.
We numerically simulate a pulsed hyper-entangled photon source and study the performance of the proposed network configurations for quantum key distribution.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Bridging the long distances between different metropolitan-scale quantum networks is currently best achieved using satellites, which can cover thousands of kilometres. The development of efficient approaches to establish connectivity between ground nodes and a satellite is therefore an essential next step. We propose a network with dual-functionality: during a brief satellite pass, the ground network is configured as a multipoint-to-point topology where all ground nodes establish entanglement with a satellite receiver. During times when this satellite is not available, the satellite up-link is rerouted via a single optical switch to the ground nodes, and the network is configured as a pair-wise ground network. We numerically simulate a pulsed hyper-entangled photon source and study the performance of the proposed network configurations for quantum key distribution. We find favourable resource overheads in the case that the satellite receiver exploits time-multiplexing whereas the ground nodes utilize frequency-multiplexing. Our results show high and scalable key rates can be achieved in both configurations. The scalability, simple reconfigurability, and easy integration with fibre networks make this architecture a promising candidate for quantum communication of many ground nodes and a satellite thus paving the way towards interconnection of ground nodes at a global scale.
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