We discuss a technique to strongly couple a single target quantum emitter to a cavity mode, which is enabled by virtual excitations of a nearby mesoscopic ensemble of emitters. A collective coupling of the latter to both the cavity and the target emitter induces strong photon nonlinearities in addition to polariton formation, in contrast to common schemes for ensemble strong coupling. We demonstrate that strong coupling at the level of a single emitter can be engineered via coherent and dissipative dipolar interactions with the ensemble, and provide realistic parameters for a possible implementation with ${\mathrm{SiV}}^{-}$ defects in diamond. Our scheme can find applications, amongst others, in quantum information processing or in the field of cavity-assisted quantum chemistry.

中文翻译：

---

单个量子发射器的集合诱导强光耦合。

我们讨论了一种将单个目标量子发射器与腔模强耦合的技术，该腔模由附近的介观发射器集合的虚拟激发来实现。与整体强耦合的方案相反，后者的极化耦合到腔体和目标发射器两者上，除了极化子形成外，还引起强光子非线性。我们证明，可以通过与集合体的相干和耗散偶极相互作用来设计单个发射器级的强耦合，并为可能的实现提供现实的参数。${\mathrm{战车}}^{-}$钻石中的缺陷。我们的方案可以在量子信息处理或腔辅助量子化学领域找到应用。