The influence of experimental imperfections on photonic GHZ state generation
F. Wiesner1, H.M. Chrzanowski2,3, G. Pieplow3, T. Schröder3,4, A. Pappa1,5 and J. Wolters2,6
Published in:
New J. Phys., vol. 26 no. 11, pp. 113021, doi:10.1088/1367-2630/ad916f (2024).
Abstract:
While the advantages of photonic quantum computing, including direct compatibility with communication, are apparent, several imperfections such as loss and distinguishability presently limit actual implementations. These imperfections are unlikely to be completely eliminated, and it is therefore beneficial to investigate which of these are the most dominant and what is achievable under their presence. In this work, we provide an in-depth investigation of the influence of photon loss, multi-photon terms and photon distinguishability on the generation of photonic 3-partite Greenberger–Horne–Zeilinger states via established fusion protocols. We simulate the generation process for spontaneous parametric down-conversion and solid-state-based single-photon sources using realistic parameters and show that different types of imperfections are dominant with respect to the fidelity and generation success probability. Our results indicate what are the dominant imperfections for the different photon sources and in which parameter regimes we can hope to implement photonic quantum computing in the near future.
1 Electrical Engineering and Computer Science Department, Technische Universität Berlin, 10587 Berlin, Germany
2 Institute of Optical Sensor Systems, Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR), 12489 Berlin, Germany
3 Department of Physics, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
4 Ferdinand-Braun-Institut, 12489 Berlin, Germany
5 Fraunhofer Institute for Open Communication Systems—FOKUS, 10589 Berlin, Germany
6 Institute of Optics and Atomic Physics, Technische Universität Berlin, 10623 Berlin, Germany
Keywords:
linear optical quantum computing, quantum simulation, experimental imperfections, photonic GHZ state
© 2024 The Author(s). Published by IOP Publishing Ltd on behalf of the Institute of Physics and Deutsche Physikalische Gesellschaft
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