Workbench
10 AI tools for quantum developers
The visualizations teach. These produce results: a circuit verified against a spec, a decoder you trained, a routing that beat the heuristic, an experiment an agent ran and wrote up. Same engines as the course, pointed at your problem.
Every tool runs in your browser on the exact statevector simulator. Each one reproduces a published result at demo scale, and says plainly where demo scale stops. The generation and experiment tools are also exposed to agents through the MCP server at /api/mcp/mcp, documented in docs/MCP.md.
Generate
Ask for a circuit and get one that passed a checker, with the failures on the record.
Verified Circuit Generation
A circuit that passes a spec you wrote — target histogram, state or unitary, plus gate-set and depth limits — checked on the simulator, with every failed attempt and its diagnostics on the record.
Reproduces Verifier-in-the-loop code generation: the model proposes, an exact checker rejects, and the rejection is fed back — the pattern behind self-correcting LLM coding agents, applied to OpenQASM.
Algorithm Evolution
A MaxCut or state-preparation heuristic that beat its own ancestors — QAOA schedules and local-search programs proposed by several models, scored on the simulator, with the lineage of every survivor.
Reproduces Quantinuum's Hive (2025): a swarm of frontier models evolving Guppy and CUDA-Q programs against an execution harness, here reduced to a closed DSL and a visible budget.
Train
Train a model in your browser against a hard, exact baseline and watch the gap close.
Decoder Lab
A logical-vs-physical error-rate chart across the surface-code threshold, with a lookup table, an MLP and a transformer you trained in-browser racing exact MWPM at d = 3, 5 and 7.
Reproduces AlphaQubit (Bausch et al., Nature 2024): a transformer decoder that beat matching on surface-code memory experiments.
Calibration Agent
A drifting qubit whose X gate an RL agent holds above 99.5% from measurement counts alone, at fewer shots per step than recalibrating on a schedule — with the hidden truth drawn for you.
Reproduces Google's July 2026 result: an RL agent holding gate fidelity on Willow by adjusting 1,000+ control parameters from measurement statistics, replacing scheduled recalibration.
Optimise
Fit a circuit to a real device topology with fewer two-qubit gates than the heuristic.
Run
Point an agent at a target and read back the experiment it ran, as a record you can audit.
Experiment Runner
A record your agent wrote over MCP while you slept: hypothesis, every circuit with its target and counts, conclusion.
Reproduces The hypothesis → run → record → conclude loop of agent-driven science (e.g. the AI Scientist, 2024), with targets and jobs modelled on Coda MCP, at the scale of a 16-qubit simulator.
GPU Simulator
The same circuit on your CPU and your GPU: wall time, the largest statevector each reaches under a stated budget, and the float32-vs-float64 gap.
Reproduces WebGPU statevector simulation — 2^N × 8 bytes of float32 amplitudes in a compute shader
Run This Paper
Teleportation, superdense coding, Grover, the GHZ paradox, BB84 and E91 — each paper’s own protocol, executed live and checked against what the paper reported.
Reproduces Six landmark results (1984–1996) run on the site’s own presets and protocol simulators — not a general paper-to-circuit pipeline, a curated and citation-checked set.
Measure
Put a number on a claim — a mitigated expectation value, a quantum-vs-classical score with its cost.
Noise Sandbox and Mitigation
A circuit run under a depolarising, T1/T2 and readout noise model, with the ideal, noisy, readout-mitigated and zero-noise-extrapolated expectation values side by side — error bars included.
Reproduces Zero-noise extrapolation by gate folding (Temme, Bravyi & Gambetta 2017; Li & Benjamin 2017) and readout inversion via a calibrated confusion matrix, as run on IBM and Google hardware.
QML Reality Check
An honest table: a variational quantum classifier against a tuned logistic regression and a small MLP on moons, circles and one quantum-generated set — held-out accuracy and training cost in circuit evaluations versus flops.
Reproduces The 2026 state of quantum machine learning: no accepted advantage on classical data, dequantised claims, data-loading and barren-plateau limits — and a demonstrated edge only when the data itself came from a quantum process.