Foundations
Before the quantum, the classical. Bits, chance, and the piece of math that makes qubits possible: complex numbers.
- 1.1 Bits, chance, and complex numbers
- 1.2 Just enough complex numbers
- 1.3 Vectors and superposition as weighted sums
Qiskit tutorials and textbooks are written for people who already know. This site is for everyone else — curious beginners, younger learners, and anyone who bounced off the formalism and came back wanting to see it.
Every concept starts with something you can drag, click, or watch animate. The math comes later, when it's earned.
Every abstract concept has a widget. Drag the Bloch sphere, flip coins, watch the Born rule emerge from 100 measurements. The math arrives after the intuition.
You do not need linear algebra, Dirac notation, or undergraduate physics. We start with classical bits and chance, and walk up gently from there.
Qubits, gates, entanglement, teleportation, algorithms, error correction. The curriculum is growing — see the roadmap below for what's live and what's coming.
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 →