Print Email Facebook Twitter Analysing the Effect of Asymmetry on the Performance of Atomic Ensemble Based Repeater Protocols Title Analysing the Effect of Asymmetry on the Performance of Atomic Ensemble Based Repeater Protocols Author Jirovská, Hana (TU Delft Electrical Engineering, Mathematics and Computer Science) Contributor Maier, D.J. (mentor) Wehner, S.D.C. (graduation committee) Gerritsen, B.H.M. (graduation committee) Degree granting institution Delft University of Technology Date 2021-07-01 Abstract There has been a lot of research focused on the next generation of the internet, the so-called quantum networks. This analysis has been so far limited to mostly symmetrical architectures, but any near-term realisations of quantum networks using existing fibre topologies will contain asymmetry. In this thesis, we investigate how midpoint asymmetry affects quantum repeater protocols implemented with atomic ensembles. We extend the existing simulation framework to allow for midpoint asymmetry. By simulating asymmetry in elementary links, we show that the performance of an elementary link executing quantum key distribution decreases with an increasing degree of asymmetry. This effect can be mitigated by individual optimisation of photon sources at both ends of the elementary link. We present a way how to reduce the search space of such optimisations by developing a heuristic. The contributions of this thesis provide a crucial starting point for investigations of asymmetry in quantum repeater chains. Subject quantum networkssimulationatomic ensemblesrepeater protocols To reference this document use: http://resolver.tudelft.nl/uuid:d01066a8-1c44-40bf-81b2-9416aaea7e98 Part of collection Student theses Document type bachelor thesis Rights © 2021 Hana Jirovská Files PDF Jirovska_RP_paper.pdf 1.09 MB Close viewer /islandora/object/uuid:d01066a8-1c44-40bf-81b2-9416aaea7e98/datastream/OBJ/view