Quantum communication with semiconductor quantum dots
Abstract: Semiconductor quantum dots (QDs) are able to confine single charges on the nanoscale in all three dimensions of space, making them excellent systems for exploring quantum phenomena. In particular, QDs have demonstrated outstanding performance as sources of entangled and indistinguishable photon pairs [1,2], properties highly desired in the fields of quantum communication and -information processing. Here I report on the advances of QDs as potential resources for photonic quantum networks, which allow to overcome the fundamental range limitations of single photon-based applications by distributing entanglement over basically unlimited distances [3]. After an introduction to the underlying mechanisms of entangled photon pair generation, I demonstrate several building blocks of quantum networks, such as quantum teleportation [4], entanglement swapping [5] and quantum key distribution [6], and conclude with a perspective towards a real-life quantum-network based entirely on QDs.
[1] D. Huber et al, Nat. Commun. 8, 15506 (2017)
[2] L. Schweickert et al., Appl. Phys. Lett. 112, 093106 (2018)
[3] H. J. Kimble, Nature 453, 1023-1030 (2008)
[4] M. Reindl et al., Sci. Adv. 4, eaau1255 (2018)
[5] F. Basso Basset et al, Phys. Rev. Lett. 16, 160501 (2019)
[6] C. Schimpf et al., Sci. Adv. 7, eabe8905 (2021)
Bio: My academic career started in 2012 with the beginning of my physics studies at the Johannes Kepler University of Linz, Austria. Currently I am in the later stage of my PhD studies, which I perform as research associate in the group of Prof. Armando Rastelli, at the institute of semiconductor- and solid state physics. My research focus lies on semiconductor quantum dots, with emphasis on the generation of non-classical light for quantum optics and applications in the context of quantum communication. My hobbies are coding (games, applications), video games and sports.
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