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  Down-conversion processes in ab initio nonrelativistic quantum electrodynamics

Welakuh, D., Ruggenthaler, M., Tchenkoue Djouom, M.-L., Appel, H., & Rubio, A. (2021). Down-conversion processes in ab initio nonrelativistic quantum electrodynamics. Physical Review Research, 3(3): 033067. doi:10.1103/PhysRevResearch.3.033067.

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PhysRevResearch.3.033067.pdf (Publisher version), 8MB
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PhysRevResearch.3.033067.pdf
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Open Access. -Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) andthe published article's title, journal citation, and DOI. Open access publication funded by the Max Planck Society.
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2021
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© the Author(s). Published by the American Physical Society

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https://arxiv.org/abs/2103.06947 (Preprint)
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 Creators:
Welakuh, D.1, 2, 3, 4, Author              
Ruggenthaler, M.1, 2, 3, 5, Author
Tchenkoue Djouom, M.-L.1, 2, 3, 4, Author              
Appel, H.1, 2, 3, Author
Rubio, A.1, 2, 3, 5, 6, Author
Affiliations:
1Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
2Center for Free-Electron Laser Science, ou_persistent22              
3Department of Physics, Universität Hamburg, ou_persistent22              
4International Max Planck Research School for Ultrafast Imaging & Structural Dynamics (IMPRS-UFAST), Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266714              
5The Hamburg Center for Ultrafast Imaging, Universität Hamburg, ou_persistent22              
6Center for Computational Quantum Physics, Flatiron Institute, ou_persistent22              

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 Abstract: The availability of efficient photon sources with specific properties is important for quantum-technological applications. However, the realization of such photon sources is often challenging and hence alternative perspectives that suggest different means to enhance desired properties while suppressing detrimental processes are valuable. In this work we highlight that ab initio simulations of coupled light-matter systems can provide such alternative avenues. We show for a simple model of a quantum ring that by treating light and matter on equal footing, we can create and enhance pathways for down-conversion processes. By changing the matter subsystem as well as the photonic environment in experimentally feasible ways, we can engineer hybrid light-matter states that enhance at the same time the efficiency of the down-conversion process and the nonclassicality of the created photons. Furthermore, we show that this also leads to a faster down-conversion, potentially avoiding detrimental decoherence effects.

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Language(s): eng - English
 Dates: 2021-03-112021-07-012021-07-19
 Publication Status: Published online
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 Rev. Type: Peer
 Identifiers: arXiv: 2103.06947
DOI: 10.1103/PhysRevResearch.3.033067
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Title: Physical Review Research
Source Genre: Journal
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Publ. Info: College Park, Maryland, United States : American Physical Society (APS)
Pages: - Volume / Issue: 3 (3) Sequence Number: 033067 Start / End Page: - Identifier: ISSN: 2643-1564
CoNE: https://pure.mpg.de/cone/journals/resource/2643-1564