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10 June 2024 Precision synchronization for satellite quantum communication
Neal W. Spellmeyer
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Proceedings Volume PC13025, Advanced Photon Counting Techniques XVIII; PC1302506 (2024) https://doi.org/10.1117/12.3016722
Event: SPIE Defense + Commercial Sensing, 2024, National Harbor, Maryland, United States
Abstract
Precision synchronization is vital for robust long-distance quantum networking over fiber and free-space channels for which high-fidelity entanglement swapping between separate sources via an optical Bell state measurement requires temporal overlap of photonic qubits arriving from either source. This challenge is particularly distinct in satellite-based entanglement distribution in which relative motion, channel effects, and propagation delay must be addressed. This talk will describe recent progress on developing and testing a precision synchronization method for free space entanglement distribution in a dual-uplink architecture in which photons from entanglement sources at two ground locations interact in an optical Bell-state measurement implemented on a satellite in a low-earth orbit. The control approach uses independent entanglement sources at each ground location supplemented with a synchronization signal for feedback control from a timing discriminant measured at the spacecraft.
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Neal W. Spellmeyer "Precision synchronization for satellite quantum communication", Proc. SPIE PC13025, Advanced Photon Counting Techniques XVIII, PC1302506 (10 June 2024); https://doi.org/10.1117/12.3016722
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KEYWORDS
Satellites
Quantum entanglement
Long distance quantum communication
Quantum based satellite communication
Satellite communications
Free space optics
Quantum channels
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