TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.12.3.094
TI  - Multimode-polariton superradiance via Floquet engineering
PY  - 2022/03/16
UR  - https://scipost.org/SciPostPhys.12.3.094
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 12
IS  - 3
SP  - 094
A1  - Johansen, Christian H.
AU  - Lang, Johannes
AU  - Morales, Andrea
AU  - Baumgärtner, Alexander
AU  - Donner, Tobias
AU  - Piazza, Francesco
AB  - We consider an ensemble of ultracold bosonic atoms within a near-planar cavity, driven by a far detuned laser whose phase is modulated at a frequency comparable to the transverse cavity mode spacing. We show that a strong, dispersive atom-photon coupling can be reached for many transverse cavity modes at once. The resulting Floquet polaritons involve a superposition of a set of cavity modes with a density excitation of the atomic cloud. The mutual interactions between these modes lead to distinct avoided crossings between the polaritons. Increasing the laser drive intensity, a low-lying multimode Floquet polariton softens and eventually becomes undamped, corresponding to the transition to a superradiant, self-organized phase. We demonstrate the stability of the stationary state for a broad range of parameters.
ER  -

@Article{10.21468/SciPostPhys.12.3.094,
	title={{Multimode-polariton superradiance via Floquet engineering}},
	author={Christian Høj Johansen and Johannes Lang and Andrea Morales and Alexander Baumgärtner and Tobias Donner and Francesco Piazza},
	journal={SciPost Phys.},
	volume={12},
	pages={094},
	year={2022},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.12.3.094},
	url={https://scipost.org/10.21468/SciPostPhys.12.3.094},
}