TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhysCore.7.3.038
TI  - (Almost) everything is a Dicke model - Mapping non-superradiant correlated light-matter systems to the exactly solvable Dicke model
PY  - 2024/07/02
UR  - https://scipost.org/SciPostPhysCore.7.3.038
JF  - SciPost Physics Core
JA  - SciPost Phys. Core
VL  - 7
IS  - 3
SP  - 038
A1  - Schellenberger, Andreas
AU  - Schmidt, Kai Phillip
AB  - We investigate classes of interacting quantum spin systems in a single-mode cavity with a Dicke coupling, as a paradigmatic example of strongly correlated light-matter systems. Coming from the limit of weak light-matter couplings and large number of matter entities, we map the relevant low-energy sector of a broad class of models in the non-superradiant phases onto the exactly solvable Dicke model. We apply the outcomes to the Dicke-Ising model as a paradigmatic example [Phys. Rev. Res. 2, 023131 (2020), Sci. Rep. 4, 4083 (2014)], in agreement with results obtained by mean-field theory [Sci. Rep. 4, 4083 (2014)]. We further accompany and verify our findings with finite-size calculations, using exact diagonalization and the series expansion method pcst$^{++}$ [Phys. Rev. A 108, 013323 (2023)]
ER  -

@Article{10.21468/SciPostPhysCore.7.3.038,
	title={{(Almost) everything is a Dicke model - Mapping non-superradiant correlated light-matter systems to the exactly solvable Dicke model}},
	author={Andreas Schellenberger and Kai Phillip Schmidt},
	journal={SciPost Phys. Core},
	volume={7},
	pages={038},
	year={2024},
	publisher={SciPost},
	doi={10.21468/SciPostPhysCore.7.3.038},
	url={https://scipost.org/10.21468/SciPostPhysCore.7.3.038},
}