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  Quantum to classical crossover of Floquet engineering in correlated quantum systems

Sentef, M. A., Li, J., Künzel, F., & Eckstein, M. (2020). Quantum to classical crossover of Floquet engineering in correlated quantum systems. Physical Review Research, 2(3): 033033. doi:10.1103/PhysRevResearch.2.033033.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-AB43-E Version Permalink: http://hdl.handle.net/21.11116/0000-0006-AB44-D
Genre: Journal Article

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PhysRevResearch.2.033033.pdf (Publisher version), 2MB
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PhysRevResearch.2.033033.pdf
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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) and the published article's title, journal citation, and DOI. Open access publication funded by the Max Planck Society.
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2020
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 Creators:
Sentef, M. A.1, Author              
Li, J.2, Author
Künzel, F.2, Author
Eckstein, M.2, Author
Affiliations:
1Theoretical Description of Pump-Probe Spectroscopies in Solids, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_3012828              
2Department of Physics, University of Erlangen-Nuremberg, ou_persistent22              

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 Abstract: Light-matter coupling involving classical and quantum light offers a wide range of possibilities to tune the electronic properties of correlated quantum materials. Two paradigmatic results are the dynamical localization of electrons and the ultrafast control of spin dynamics, which have been discussed within classical Floquet engineering and in the deep quantum regime where vacuum fluctuations modify the properties of materials. Here we discuss how these two extreme limits are interpolated by a cavity which is driven to the excited states. In particular, this is achieved by formulating a Schrieffer-Wolff transformation for the cavity-coupled system, which is mathematically analogous to its Floquet counterpart. Some of the extraordinary results of Floquet engineering, such as the sign reversal of the exchange interaction or electronic tunneling, which are not obtained by coupling to a dark cavity, can already be realized with a single-photon state (no coherent states are needed). The analytic results are verified and extended with numerical simulations on a two-site Hubbard model coupled to a driven cavity mode. Our results generalize the well-established Floquet engineering of correlated electrons to the regime of quantum light. This opens up a pathway of controlling properties of quantum materials with high tunability and low energy dissipation.

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Language(s): eng - English
 Dates: 2020-02-282020-06-112020-07-07
 Publication Status: Published online
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 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevResearch.2.033033
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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 (3) Sequence Number: 033033 Start / End Page: - Identifier: ISSN: 2643-1564
CoNE: https://pure.mpg.de/cone/journals/resource/2643-1564