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This research proposes a novel method for global quantum entanglement distribution by physically transporting rare-earth-ion qubit processors via satellites, potentially outperforming existing satellite-based schemes. The study demonstrates that this approach could achieve high-fidelity daytime operations and scale to constellations without incurring additional channel losses, marking significant progress toward practical quantum internet infrastructure.
Scheme for Transport-based Global Entanglement Distribution using Quantum Processors
arXiv:2606.15421v1 Announce Type: new Abstract: We propose a scheme for distributing entanglement over global distances in a heralded manner by using satellites to physically transport entangled processor nodes with rare-earth-ion qubits. A full analysis of channel losses, errors and background light is performed to determine the fidelity and number of entangled pairs that can be distributed between two ground stations. We show that the scheme works already with a single satellite and can distribute close to the theoretical maximum number of entangled pairs that can be generated in a satellite overpass. In addition, we argue that in theory transportation-based schemes outperform other satellite-based schemes and can be scaled up to a constellation without additional channel losses. Daytime operation seems feasible as long as the sky is clear, with an EPR pair fidelity ranging from 99.3% at shorter network lengths to 93.9% with global coverage and can be further improved by active error correction or entanglement purification.
Abstract:We propose a scheme for distributing entanglement over global distances in a heralded manner by using satellites to physically transport entangled processor nodes with rare-earth-ion qubits. A full analysis of channel losses, errors and background light is performed to determine the fidelity and number of entangled pairs that can be distributed between two ground stations. We show that the scheme works already with a single satellite and can distribute close to the theoretical maximum number of entangled pairs that can be generated in a satellite overpass. In addition, we argue that in theory transportation-based schemes outperform other satellite-based schemes and can be scaled up to a constellation without additional channel losses. Daytime operation seems feasible as long as the sky is clear, with an EPR pair fidelity ranging from 99.3% at shorter network lengths to 93.9% with global coverage and can be further improved by active error correction or entanglement purification.
Main paper 6 pages, 3 figures and 1 table. total 15 pages, 3 figures and 3 tables
Quantum Physics (quant-ph); Atomic Physics (physics.atom-ph); Optics (physics.optics)
arXiv:2606.15421 [quant-ph]
(or arXiv:2606.15421v1 [quant-ph] for this version)
https://doi.org/10.48550/arXiv.2606.15421 Focus to learn more arXiv-issued DOI via DataCite (pending registration)
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