Monium

Interactive superconducting-qubit physics in your pocket: sweep parameters and watch spectra, wavefunctions, matrix elements, and coherence times update live.

Monium puts superconducting-qubit physics in your pocket — a mobile companion to the open-source scqubits library, built for researchers, students, and the quantum-curious.

Pick a qubit, tune its parameters with live sliders, and watch the physics update in real time:

• Energy spectrum vs. any swept parameter • Wavefunctions over the potential (and in the charge basis) • Matrix elements as a heatmap, and vs. the swept parameter • T1 / T2 coherence times per noise channel • Exact computed values behind every plot, as tables

Supported qubits: Transmon, Tunable Transmon (SQUID), and Fluxonium.

Built for real work: • Enter the Josephson energy the way you measure it — critical current, junction inductance, or room-temperature normal-state resistance (with a cryo/room ratio). • Save and reload presets per qubit. • Convergence indicators so you can trust the numbers.

Everything runs on-device. No account, no ads, no tracking, no network — your work stays on your phone.

Monium mirrors scqubits' conventions and is validated against it, so the numbers match the desktop tool you already trust.