Quantum to classical crossover of Floquet engineering in correlated quantum systems
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 discuss...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
American Physical Society
2020-07-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.2.033033 |
| _version_ | 1797211385580486656 |
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| author | Michael A. Sentef Jiajun Li Fabian Künzel Martin Eckstein |
| author_facet | Michael A. Sentef Jiajun Li Fabian Künzel Martin Eckstein |
| author_sort | Michael A. Sentef |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-24T10:25:39Z |
| format | Article |
| id | doaj.art-2a214be0a82143638b9a67440a779ab1 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:25:39Z |
| publishDate | 2020-07-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-2a214be0a82143638b9a67440a779ab12024-04-12T16:56:43ZengAmerican Physical SocietyPhysical Review Research2643-15642020-07-012303303310.1103/PhysRevResearch.2.033033Quantum to classical crossover of Floquet engineering in correlated quantum systemsMichael A. SentefJiajun LiFabian KünzelMartin EcksteinLight-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.http://doi.org/10.1103/PhysRevResearch.2.033033 |
| spellingShingle | Michael A. Sentef Jiajun Li Fabian Künzel Martin Eckstein Quantum to classical crossover of Floquet engineering in correlated quantum systems Physical Review Research |
| title | Quantum to classical crossover of Floquet engineering in correlated quantum systems |
| title_full | Quantum to classical crossover of Floquet engineering in correlated quantum systems |
| title_fullStr | Quantum to classical crossover of Floquet engineering in correlated quantum systems |
| title_full_unstemmed | Quantum to classical crossover of Floquet engineering in correlated quantum systems |
| title_short | Quantum to classical crossover of Floquet engineering in correlated quantum systems |
| title_sort | quantum to classical crossover of floquet engineering in correlated quantum systems |
| url | http://doi.org/10.1103/PhysRevResearch.2.033033 |
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