Artificial discovery of coupled-mode circuits with desired scattering behavior

In quantum optics, a small number of building blocks, like resonators, waveguides, driving-induced couplings, and parametric interactions allow the design of a broad variety of devices and functionalities, distinguished by their scattering properties. These include transducers, amplifiers, and nonreciprocal devices, like isolators or circulators.

Usually, the design of such a system is handcrafted by an experienced scientist. In our work, we develop a discovery algorithm that automates this process. By optimizing the continuous and discrete system properties our automated search identifies the minimal resources required to realize the requested scattering behavior. The discovered architectures represent classes of solutions and are not bound to special numerical values or platforms. Our approach is applicable to optical, microwave, mechanical, electrical, and hybrid circuits.