Cameron Paterson - Analysis of a Single Quantum Satellite Link for Entanglement Distribution

Analysis of a Single Quantum Satellite Link for Entanglement Distribution

This seminar, given by Cameron Paterson, will happend on 17 October 2025, at 14:0. It will take place in Room 24-25/405.

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Abstract

Quantum techniques enable unconditionally secure communications and improve measurement accuracy beyond what is classically possible. Robust and reliable methods for entanglement distribution will form the bedrock of such technologies. Exponential loss scaling in optical fibres preclude their use for entanglement distribution on global scales. Space-based free space are a promising platform for achieving entanglement distribution on these scales. In this work, we analyse the use of a satellite equipped with quantum memories for the purposes of entanglement distribution to two ground stations. We introduce a mathematical description of the orbital geometries and evaluate the performance of the satellite under changing geometries. The principles of memory-equipped entanglement distribution are discussed. The performance of a memory-equipped satellite employing memories is modelled and compared to that of a satellite operating without memories. We finish by evaluating the long-term ability of a satellite in a polar orbit for entanglement distribution. Our results will help inform satellite constellation and mission design, as well as inform requirements on candidate memory platforms.