How solid-state emitters can help us explore new Hamiltonians in cavity QED

Solid-state quantum photonics with spin defects promise scalability and chip integration, but it remains challenging pursue cavity quantum electrodynamics (QED) experiments of complexity on par with what is done with cold atoms due to a number of reasons both practical and fundamental. However, by leveraging their unique, solid-state features, defects in resonators are now beginning to make contributions to cavity QED physics (such as Lei, Nature (2023)). I will discuss our effort toward the study of multi-emitter cavity QED Hamiltonians using silicon vacancy color centers integrated into high-Q whispering gallery mode resonators fabricated in the 4H-SiC-on-Insulator photonics platform. The talk will include observations of indistinguishable emission from a small ensemble of ~10 emitters; descriptions of the multi-mode phase-sensitive Hamiltonians that the system realizes; the effects of disorder on photon correlations, which reveal under certain conditions the emergence of steady-state chirality in the otherwise achiral system; and the first realization of a cavity QED system in a parametrically driven optical resonator, using the strong Kerr nonlinearity of silicon carbide.