A four-panel figure: a CAD rendering of a superconducting chip layout (200 µm scale bar), its circuit diagram, a measured plot of frequency against applied flux, and a block schematic of source and detector devices. It comes from the arXiv paper "Transmon Architecture for Emission and Detection of Single Microwave Photons" by Daniel L. Campbell and co-authors. It shows three coupled transmons — storage, waveguide-linked, and a flux-driven coupler between them — that release or catch single microwave photons; notice the storage transmon's frequency barely moves.“Fig. 1 — Figure 1: (a) CAD rendering of the transmon emitter/detector (TED) layout and (b) its corresponding circuit, indexed by x∈{s et al., arxiv.org/abs/2601.11378, CC BY 4.0 (creativecommons.org/licenses/by/4.0/)
