Multi-emitter solid state quantum optics

Abstract Photonic quantum science—which harnesses light-matter interactions down to the single photon level—provides advanced light sources for quantum sensing, communication, and computing. Integrating solid-state light sources on a photonic chip provides a means of creating scalable on-chip quantum networks with sophisticated optoelectronic circuitry. Extending beyond single emitters to multi-emitter systems is a frontier that offers substantial opportunities for fundamental scientific advances as well as applications that require multi-emitter quantum states. A key challenge in this endeavor is the spectral inhomogeneity of solid-state emitters, which results in non-identical emitters that cannot be interfaced with one another. This review describes recent advances in tailoring the emission properties of individual emitters and the multi-emitter demonstrations that are enabled by this control for a variety of prominent materials, as well as prospects for further development.