Cavity Control of Quantum Materials

Coupling a material to an optical cavity might allow for ultrafast control of quantum materials through the light-matter interaction. To illustrate ways in which material properties could be altered, we present an exactly solvable model for a solid in a cavity and discuss its basic features like the squeezing of the photon in the GS or quantum analogs to Floquet theory.[1] Furthermore, we warn that approximatins to the light-matter coupling have to be taken with care as they can easily lead to a false superradiant phase, similar to the paradigmatic case of the Dicke model. Additionally, we study the effects of the cavity on correlated phases of matter such as charge density waves or superconductivity.

                                                                                          

[1] C. J. Eckhardt and G. Passetti et al., arXiv:2107.12236, 2021