A protocol that moves an unknown qubit state from A to B using one shared entangled pair and two classical bits — destroying the original in the process.
Why it matters
It is the cleanest demonstration that entanglement is a resource you can spend, and it is a building block of quantum networking and of measurement-based computation.
After this you will be able to
Hand-picked and ordered. If you only have time for one, take the first.
A rigorous but genuinely well-taught course by John Watrous covering single systems, multiple systems, quantum circuits and the core protocols. The cleanest bridge from intuition to real notation.
Drag gates onto wires and watch amplitudes, Bloch spheres and probabilities update live. Nothing else builds gate intuition this fast, and it needs no install or account.
Free, self-contained and rigorous, with exercises. Widely used as the standard course text in Europe and the best single free replacement for a paid textbook.
You cannot copy an unknown quantum state. The one-line proof is genuinely accessible, and this single fact explains teleportation, QKD security and why error correction is hard.
Twenty-two short videos taking you from the basic postulates through to quantum teleportation, taught by the co-author of Nielsen & Chuang. Whiteboard-paced and easy to follow.
Short, complete, copy-pasteable Qiskit tutorials for individual algorithms and protocols. Useful when you want one working example of a specific thing rather than a whole course.
Self-paced programming exercises with automatic verification, in the style of code katas. Superposition, measurement, oracles, Grover and teleportation, each as a set of puzzles you must actually solve.