Gu S.-S., Kohler S., Xu Y.-Q., Wu R., Jiang S.-L., Ye S.-K., Lin T., Wang B.-C., Li H.-O., Cao G., Guo G.-P.
Physical Review Letters
We experimentally and theoretically study a driven hybrid circuit quantum electrodynamics (cQED) system beyond the dispersive coupling regime. Treating the cavity as part of the driven system, we develop a theory applicable to such strongly coupled and to multiqubit systems. The fringes measured for a single driven double quantum dot (DQD)-cavity setting and the enlarged splittings of the hybrid Floquet states in the presence of a second DQD are well reproduced with our model. This opens a path to study Floquet states of multiqubit systems with arbitrarily strong coupling and reveals a new perspective for understanding strongly driven hybrid systems. © 2023 American Physical Society.
