Reference designs

Complete designs to copy and adapt, from a single unit cell to a chip with simulation. Reproductions of published devices are on the Research showcase: published devices and results, reproduced page; the 100-qubit mockup is tutorial 2.22.

Unit cells

Reference layouts from stock Quantum Metal components. A.1-A.3 are adapted with attribution from the open-source SQDMetal benchmark devices (arXiv:2511.01220).

A.1 Reference design — Transmon with readout resonator

Transmon coupled to CPW resonator

Readout line

Two qubits

Direct Coupler (transmon-transmon)

Bus Resonator Coupler (transmon-transmon)

Tunable Coupler (MIT)

A.2 Reference design — Two coupled transmons

Four qubits

A.3 Reference design — Four-qubit multiplexed readout

With analysis

A.4 Full chip design

A.7 Qiskit Metal tutorial for IMS 2022