Learn quantum computing
Six short lessons, each paired with a live circuit you can poke at. No linear algebra required — we build intuition first and notation second.
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- 1What is a qubit?6 minThe quantum bit: like a coin that can be heads, tails, or a precise blend of both.→
- 2Superposition & the Hadamard gate7 minHow one gate turns certainty into a perfect quantum coin flip — and why that's not randomness.→
- 3The gate zoo8 minX, Y, Z, phase gates and rotations — every gate is just a rotation of the Bloch sphere.→
- 4Entanglement & Bell states8 minTwo qubits that share a single fate — the phenomenon Einstein called 'spooky'.→
- 5Measurement & probability6 minWhy looking changes everything, and what 1024 shots on real hardware actually mean.→
- 6Famous circuits: Grover & teleportation9 minTwo small circuits with big ideas: searching faster than brute force, and moving states without moving matter.→
- 7The no-cloning theorem5 minWhy quantum information can be moved but never copied — and why that's a feature.→
- 8Superdense coding6 minSend two classical bits by transmitting a single qubit — entanglement pays the difference.→
- 9Deutsch's algorithm8 minThe first quantum algorithm: answer a question about two function values with a single query.→
- 10Bell's inequality9 minThe experiment that proved measurement outcomes don't exist before you measure.→
- 11Quantum cryptography: BB848 minHow single qubits let two people build a secret key that physics itself protects.→
- 12Quantum error correction8 minProtecting fragile superpositions without ever looking at them.→
- 13What quantum computers can and can't do7 minShor, Grover, simulation — and why 'tries every answer at once' is a myth.→