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  Ab initio quantum models for thin-film x-ray cavity QED

Lentrodt, D., Heeg, K. P., Keitel, C. H., & Evers, J. (2020). Ab initio quantum models for thin-film x-ray cavity QED. Physical Review Research, 2(2): 023396. doi:10.1103/PhysRevResearch.2.023396.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-BF03-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0006-BF04-F
Genre: Journal Article

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 Creators:
Lentrodt, Dominik1, Author              
Heeg, Kilian Peter1, Author              
Keitel, Christoph H.1, Author              
Evers, Jörg1, Author              
Affiliations:
1Division Prof. Dr. Christoph H. Keitel, MPI for Nuclear Physics, Max Planck Society, ou_904546              

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Free keywords: Quantum Physics, quant-ph
 MPINP: Research group J. Evers – Division C. H. Keitel
 Abstract: We develop two ab initio quantum approaches to thin-film x-ray cavity quantum electrodynamics with spectrally narrow x-ray resonances, such as those provided by M\"ossbauer nuclei. The first method is based on a few-mode description of the cavity, and promotes and extends existing phenomenological few-mode models to an ab initio theory. The second approach uses analytically-known Green's functions to model the system. The two approaches not only enable one to ab initio derive the effective few-level scheme representing the cavity and the nuclei in the low-excitation regime, but also provide a direct avenue for studies at higher excitation, involving non-linear or quantum phenomena. The ab initio character of our approaches further enables direct optimizations of the cavity structure and thus of the photonic environment of the nuclei, to tailor the effective quantum optical level scheme towards particular applications. To illustrate the power of the ab initio approaches, we extend the established quantum optical modeling to resonant cavity layers of arbitrary thickness, which is essential to achieve quantitative agreement for cavities used in recent experiments. Further, we consider multi-layer cavities featuring electromagnetically induced transparency, derive their quantum optical few-level systems ab initio, and identify the origin of discrepancies in the modeling found previously using phenomenological approaches as arising from cavity field gradients across the resonant layers.

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 Dates: 2020-06-24
 Publication Status: Published online
 Pages: 41 pages, 20 figures, added clarifications and minor corrections
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: arXiv: 2003.13859
DOI: 10.1103/PhysRevResearch.2.023396
URI: http://arxiv.org/abs/2003.13859
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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: 2 (2) Sequence Number: 023396 Start / End Page: - Identifier: ISSN: 2643-1564
CoNE: https://pure.mpg.de/cone/journals/resource/2643-1564