Limits for quantum networks with semiconductor entangled photon sources

authored by: Jingzhong Yang, Michael Zopf, Pengji Li, Nand Lal Sharma, Weijie Nie, Frederik Benthin, Tom Fandrich, Eddy Patrick Rugeramigabo, Caspar Hopfmann, Robert Keil, Oliver G. Schmidt, Fei Ding
Abstract: Semiconductor quantum dots are promising constituents for future quantum communication. Although deterministic, fast, efficient, coherent, and pure emission of entangled photons has been realized, implementing a practical quantum network remains outstanding. Here we explore the limits for 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. The consequences of device fabrication, dynamic tuning techniques and statistical effects for practical network applications are investigated. 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.
Organisation(s): Surfaces Science Section
QuantumFrontiers
Institute of Solid State Physics
Type: Preprint
Publication date: 14.09.2021
Publication status: E-pub ahead of print
Electronic version(s): https://doi.org/10.48550/arXiv.2109.06742 (Access: Open)

BibTeX

@techreport{06fe7db2a8b74813a600da60e4dfd372,
title = "Limits for quantum networks with semiconductor entangled photon sources",
abstract = " Semiconductor quantum dots are promising constituents for future quantum communication. Although deterministic, fast, efficient, coherent, and pure emission of entangled photons has been realized, implementing a practical quantum network remains outstanding. Here we explore the limits for 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. The consequences of device fabrication, dynamic tuning techniques and statistical effects for practical network applications are investigated. 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. ",
keywords = "quant-ph, cond-mat.mes-hall, cond-mat.mtrl-sci, physics.optics",
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 Patrick} and Caspar Hopfmann and Robert Keil and Schmidt, {Oliver G.} and Fei Ding",
year = "2021",
month = sep,
day = "14",
doi = "10.48550/arXiv.2109.06742",
language = "English",
type = "WorkingPaper",
}