SAMOP 2023 – wissenschaftliches Programm
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QI: Fachverband Quanteninformation
QI 33: Quantum Networks II (joint session QI/Q)
QI 33.2: Vortrag
Donnerstag, 9. März 2023, 14:45–15:00, F428
Space-borne quantum memories for global quantum networking — •Mustafa Gündoğan1, Jasminder Sidhu2, Daniel Oi1, and Markus Krutzik1 — 1Humboldt-Universität zu Berlin, Berlin, Germany — 2University of Strathclyde
Exponential losses in optical fibres limit the transmission of quantum information to around few hundred kilometres. Quantum repeaters based on the heralded storage of entangled photon pairs were proposed to increase this direct transmission limit. Nevertheless, these architectures are still limited to around few thousand kilometres.
In this talk I will present our proposal for placing quantum memories on board orbiting satellites to enable quantum networking at a truly global scale. The first idea relies on building a network of satellites equipped with QM with storage times of <1s. One can then create a quantum repeater in space to cover global distances . The second idea is to use a single orbiting satellite equipped with two QMs: one with long (∼h) and the other short (∼ms) storage times. Quantum information is then shuttled across the globe in a time-delayed quantum repeater fashion. This work is supported by the German Space Agency (DLR) with funds provided by the Federal Ministry for Economic Affairs and Climate Action (BMWK) due to an enactment of the German Bundestag under grant number 50WM2055.
 M. Gündoğan et. al., npj Quantum Information 7, 128 (2021)