Statistical limits for entanglement swapping with semiconductor entangled photon sources

authored by: Jingzhong Yang, Michael Zopf, Pengji Li, Nand Lal Sharma, Weijie Nie, Frederik Benthin, Tom Fandrich, Eddy P. Rugeramigabo, Caspar Hopfmann, Robert Keil, Oliver G. Schmidt, Fei Ding
Abstract: Semiconductor quantum dots are promising building blocks for quantum communication applications. Although deterministic, efficient, and coherent emission of entangled photons has been realized, implementing a practical quantum repeater remains outstanding. Here we explore the statistical limits for entanglement swapping with sources of polarization-entangled photons from the commonly used biexciton-exciton cascade. We stress the necessity of tuning the exciton fine structure, and explain why the often observed time evolution of photonic entanglement in quantum dots is not applicable for large quantum networks. We identify the critical, statistically distributed device parameters for entanglement swapping based on two sources. A numerical model for benchmarking the consequences of device fabrication, dynamic tuning techniques, and statistical effects is developed, in order to bring the realization of semiconductor-based quantum networks one step closer to reality.
Organisation(s): Surfaces Science Section
Institute of Solid State Physics
External Organisation(s): Leibniz Institute for Solid State and Materials Research Dresden (IFW)
Chemnitz University of Technology (CUT)
Technische Universität Dresden
Type: Article
Journal: Physical Review B
Volume: 105
ISSN: 2469-9950
Publication date: 23.06.2022
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Electronic, Optical and Magnetic Materials, Condensed Matter Physics
Electronic version(s): https://doi.org/10.1103/PhysRevB.105.235305 (Access: Open)

BibTeX

@article{d7c6019d0d1b465e86a3e1f035269156,
title = "Statistical limits for entanglement swapping with semiconductor entangled photon sources",
abstract = "Semiconductor quantum dots are promising building blocks for quantum communication applications. Although deterministic, efficient, and coherent emission of entangled photons has been realized, implementing a practical quantum repeater remains outstanding. Here we explore the statistical limits for entanglement swapping with sources of polarization-entangled photons from the commonly used biexciton-exciton cascade. We stress the necessity of tuning the exciton fine structure, and explain why the often observed time evolution of photonic entanglement in quantum dots is not applicable for large quantum networks. We identify the critical, statistically distributed device parameters for entanglement swapping based on two sources. A numerical model for benchmarking the consequences of device fabrication, dynamic tuning techniques, and statistical effects is developed, in order to bring the realization of semiconductor-based quantum networks one step closer to reality.",
author = "Jingzhong Yang and Michael Zopf and Pengji Li and Sharma, {Nand Lal} and Weijie Nie and Frederik Benthin and Tom Fandrich and Rugeramigabo, {Eddy P.} and Caspar Hopfmann and Robert Keil and Schmidt, {Oliver G.} and Fei Ding",
note = "Funding Information: The authors gratefully acknowledge the funding by the German Federal Ministry of Education and Research (BMBF) within the project Q.Link.X (16KIS0869) and QR.X (16KISQ015), the European Research Council (QD-NOMS GA715770), and the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy (EXC-2123) QuantumFrontiers (390837967).",
year = "2022",
month = jun,
day = "23",
doi = "10.1103/PhysRevB.105.235305",
language = "English",
volume = "105",
journal = "Physical Review B",
issn = "2469-9950",
publisher = "American Institute of Physics",
number = "23",
}