Learn quantum mechanics by playing with it
12 interactive visualizations, a real quantum circuit simulator, and an AI tutor — no install, no API key, no maths degree.
- 12 visualizations
- 16-qubit simulator
- 0 dependencies to run
Three ways in
What’s inside
Interactive Visualizations
Five hands-on simulations of the experiments that define quantum mechanics. Drag the sliders, break your intuition.
Circuit Simulator
Build quantum circuits with drag-and-drop gates, run thousands of shots, and export real OpenQASM 3.
AI Tutor
Ask anything. The tutor runs circuits to show you the answer instead of just asserting it.
A path through it
Start here
Each one builds on the last. Start with the experiment that broke classical physics, finish with a particle walking through a wall.
- The Double-Slit ExperimentBeginnerFire electrons one at a time and watch stripes appear that no particle should make.
- Superposition & MeasurementBeginnerBuild a quantum state gate by gate, then find out what measuring it actually destroys.
- The Bloch SphereBeginnerEvery possible state of a single qubit, as one point on a globe you can spin.
- EntanglementIntermediateTwo qubits whose answers always match — without either one carrying the answer.
- Quantum TunnelingIntermediateA particle without the energy to climb the wall, appearing on the other side anyway.
- Grover's SearchIntermediateFind one item in a million with a thousand guesses — by making the wrong answers cancel.
- Quantum Fourier TransformAdvancedThe transform at the heart of Shor’s algorithm, with every phase laid bare.
- DecoherenceIntermediateWatch a qubit forget — the arrow retracts into the sphere and takes the phase with it.
- VQE and the Barren PlateauAdvancedA classical optimiser hunts a ground-state energy across a landscape that goes flat as the qubit count grows.
- Shor's Algorithm: Period FindingAdvancedThe one quantum step inside factoring — finding a hidden period, not the factors themselves.
- The Surface CodeAdvancedWhy one error-corrected qubit costs a hundred real ones, and what happens when you skimp on distance.
- Decoder Duel: Lookup vs LearnedAdvancedA neural decoder trains in your browser and chases majority vote — which, on this code, is provably unbeatable.
Why not just use IBM, Brilliant, or a MOOC?
The combination nobody else offers
IBM’s Qiskit textbook has real hardware and a huge community, but no guided tutoring. Brilliant teaches beautifully but never runs a real circuit. University courses give you rigor and a credential, at a multi-week pace. Qubit16 is the one place that combines Brilliant’s visual, interactive teaching with real circuit execution — actual Qiskit and Aer under the hood, not an animation built to look convincing — a live AI tutor that can see what you built, and a spaced-repetition review queue that brings quiz questions back right before you’d forget them, instead of leaving retention to chance. Free to start, zero install, and every line of progress stays in your browser — no account required to begin.