Regensburg 2022 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 8: Quantum Dots and Wires 2: Optics 1
HL 8.3: Vortrag
Montag, 5. September 2022, 15:45–16:00, H32
Statistical limits for entanglement swapping with independent semiconductor quantum dots — •Jingzhong Yang1, Michael Zopf1, Pengji Li1, Nand Lal Sharma2, Weijie Nie2, Frederik Benthin1, Tom Fandrich1, Eddy Patric Rugeramigabo1, Caspar Hopfmann2, Robert Keil2, Oliver. G. Schmidt2,3,4, and Fei Ding1,5 — 1Institut für Festkörperphysik, Leibniz Universität Hannover, Appelstraße 2, 30167 Hannover, Germany — 2Institute for Integrative Nanosciences, Leibniz IFW Dresden, Helmholtzstraße 20, 01069 Dresden, Germany — 3Material Systems for Nanoelectronics, Technische Universität Chemnitz, 09107 Chemnitz, Germany — 4Nanophysics, Faculty of Physics and Würzburg-Dresden Cluster of Excellence ct.qmat, TU Dresden, 01062 Dresden, Germany — 5Laboratorium für Nano- und Quantenengineering, Leibniz Universität Hannover, Schneiderberg 39, 30167 Hannover, Germany
Semiconductor quantum dots are promising constituents for future quantum communication. Here we explore the limits for sources of polarization-entangled photons from biexciton-exciton cascade of the quantum dots. We stress the necessity of tuning the exciton fine structure, and explain why the time evolution of photonic entanglement in quantum dots is not applicable for large quantum networks. We identify the critical device parameters and present a numerical model for benchmarking the device scalability in order to bring the realization of distributed semiconductor-based quantum networks one step closer to reality.