Photon pumping in a weakly-driven quantum cavity–spin system
- Creators
-
Psaroudaki, Christina
- Refael, Gil
Abstract
We investigate the photon pumping effect in a topological model consisting of a periodically driven spin-1/2 coupled to a quantum cavity mode out of the adiabatic limit. In the strong-drive adiabatic limit, a quantized frequency conversion of photons is expected as the temporal analog of the Hall current. We numerically establish a novel photon pumping phenomenon in the experimentally accessible nonadiabatic driving regime for a broad region of the parameter space. The photon frequency conversion efficiency exhibits strong fluctuations and high efficiency that can reach up 80% of the quantized value for commensurate frequency combinations. We link the pumping properties to the delocalization of the corresponding Floquet states which display multifractal behavior as the result of hybridization between localized and delocalized sectors. Finally we demonstrate that the quantum coherence properties of the initial state are preserved during the frequency conversion process in both the strong and ultra-weak-drive limit.
Additional Information
© 2021 Elsevier Inc. Received 13 April 2021, Accepted 4 June 2021, Available online 11 June 2021. We are grateful to Ivar Martin and Frederik Nathan for useful discussions. C.P. has received funding from the European Union's Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Grant Agreement No. 839004. We are also grateful to the U.S. Department of Energy, Office of Science, Basic Energy Sciences under Award de-sc0019166. G.R. is also grateful to the NSF DMR, USA Grant No. 1839271. NSF and DOE supported G.R.'s time commitment to the project in equal shares. NSF provided partial support to C.P. This work was performed in part at Aspen Center for Physics, which is supported by National Science Foundation, USA grant PHY-1607611. G.R. is also grateful for support from the Simons Foundation, USA and the Packard Foundation, USA. CRediT authorship contribution statement: Christina Psaroudaki: Formal analysis, Investigation, Writing - original draft, Visualization, Methodology, Software, Funding acquisition. Gil Refael: Conceptualization, Methodology, Validation, Supervision, Funding acquisition, Formal analysis. The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.Attached Files
Submitted - 2104.06419.pdf
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Additional details
- Eprint ID
- 109075
- DOI
- 10.1016/j.aop.2021.168553
- Resolver ID
- CaltechAUTHORS:20210511-095252246
- 839004
- Marie Curie Fellowship
- DE-SC0019166
- Department of Energy (DOE)
- DMR-1839271
- NSF
- PHY-1607611
- NSF
- Simons Foundation
- David and Lucile Packard Foundation
- Created
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2021-05-11Created from EPrint's datestamp field
- Updated
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2021-12-17Created from EPrint's last_modified field
- Caltech groups
- Institute for Quantum Information and Matter, Walter Burke Institute for Theoretical Physics