Nine modules, from what a qubit is to how real quantum computers work. The first four lessons are live. Everything else is on the roadmap and will land as it's built.
Before the quantum, the classical. Bits, chance, and the piece of math that makes qubits possible: complex numbers.
The smallest quantum thing. A state that is both, neither, and in between — and how to see it.
Transformations of a single qubit — the quantum equivalent of logic gates.
Two qubits together. Tensor products, entanglement, and the gates that mix them.
Einstein's 'spooky action at a distance' — and the experiment that showed Nature is stranger than he thought.
Start module →Teleportation, superdense coding, and other tricks you can do with entangled pairs.
Start module →The famous ones. From Deutsch's toy to Shor's factoring — what quantum computers can actually speed up.
Real quantum computers are noisy. How do we compute reliably on top of imperfect hardware?
How do you actually build one? Superconducting qubits, trapped ions, photons, and atoms.
Start module →