"But you can't simulate quantum systems on a classical computer — it would take exponential resources!" That's true for large systems. But for the educational range (1–2 qubits, small state spaces, illustrative approximations) a browser running JavaScript is more than enough. The goal is intuition, not production simulation.
Quantum Physics — 4 Simulations
These focus on the fundamental phenomena of quantum mechanics — the experiments and observations that forced physicists to abandon classical models.
Quantum Computing — 6 Simulations
These focus on the computation side — what makes quantum computers different from classical ones, and why that difference matters for specific algorithms.
How to Approach the Category
Start with Double-Slit and Photoelectric Effect — they're historically the experiments that created quantum mechanics. They're also the easiest, and build the intuition you need for everything else.
Then go to Qubit & Bloch Sphere. This is the gateway into quantum computing — once you understand superposition as a point on a sphere, gates become rotations, and the whole field clicks.
Grover's Algorithm is the most satisfying to watch: the amplitude amplification converges visibly in just 3 optimal iterations for N=16. No textbook diagram conveys this as well.
For educators: all quantum simulations include a "What does this show?" sidebar, key equations, and parameter controls with tooltips explaining what each slider does. They work without any plugin or download — just open the link in any modern browser.
Coming Up
The next planned additions to the quantum category are a Variational Quantum Eigensolver (VQE) visualiser and a Quantum Phase Estimation demo. Both are on the roadmap for Q2 2026.