Quantum satellite links

The range of direct links such as those used for MDI-QKD is up to a few hundred kilometers [RV15, YLT14], which limits its use to metropolitan areas. For QKD to reach farther one must employ either quantum repeaters or satellite channels for which the loss is non-exponential with distance [RB17]. The promise of satellite QKD has been realized several places around the globe with major breakthroughs demonstrated in China [JY17, SKL18]. In Canada a quantum satellite project (QEYSSat) [TJ14] has been fully funded and is set for launch in 2022.

Current projects

References – Quantum Satellite Links

[JY17]          J Yin, Y Cao, Y-H Li, et al., Science 356, 1140 (2017)

[RB17]          R Bedington, J Miguel Arrazola and A Ling, npj Quantum Info., 3, 30 (2017)

[RV15]         Valivarthi, R. et al.,  J. Mod. Opt. 62, 1141 (2015)

[SKL18]        S.-K. Liao, W-Q Cai, J Handsteiner et al., Phys. Rev. Lett. 120, 030501 (2018)

[TJ14]          T Jennewein, J P Bourgoin, R Choi, et al., Proceedings of SPIE 8997, 89970A-1 (2014)

[YLT14]        Tang, Y.-L. et al., Phys. Rev. Lett. 113, 190501 (2014).