Two optical images: (a) a photograph of a whole 64-qubit superconducting chip (5 mm scale bar) tiled with sixteen four-qubit unit cells over a regular grid of dark circular features; (b) a false-coloured close-up (1 mm scale bar) of one unit cell with readout resonators, filter resonators, qubits, qubit–qubit couplers and, at its centre, a through-silicon via connecting to the readout feedline. It is Figure 9 of arXiv 2608.25484 by Spring, Hesse, Wang, Tamate and Nakamura. It shows out-of-plane wiring in practice: signals reach the middle of a large qubit array through the substrate instead of from the chip edge.“Fig. 9 — Figure 9: Images of the 64-qubit device. (a) Photograph of the 64-qubit chip. The unit cell containing the measured qubit is highlighted. (b) False-colored…” by Peter A. Spring, Adrian L. Hesse, Shiyu Wang, Shuhei Tamate, Yasunobu Nakamura, arxiv.org/abs/2608.25484, CC BY 4.0 (creativecommons.org/licenses/by/4.0/)
