Learn Quantum Computing with Qiskit Textbook
IBM Quantum / Qiskit Team
19 courses · 3 tutorials
IBM Quantum / Qiskit Team
Xanadu
Brilliant.org
Delft University of Technology (QuTech)
Quantum Optics and Spectroscopy Group, University of Innsbruck
Coursera / Community
Microsoft Quantum
Qubit by Qubit instructors (Stanford PhDs)
IBM Quantum Community
Brilliant.org
QWorld volunteer instructors
Munich Quantum Valley / TU Munich / LMU Munich
Hasso Plattner Institute / IBM Quantum
Packt
Atil Samancioglu
IBM SkillsBuild
KAIST / Joonwoo Bae
Packt
Wolfram Research
What each quantum gate actually does to a qubit state, with circuit diagrams and matrix forms for Hadamard, Pauli-X/Y/Z, CNOT, Toffoli, and the rotation gates.
Understand quantum gates as 2x2 unitary matrices, see the explicit matrices for X, Y, Z, H, S, and T gates, and learn how matrix multiplication corresponds to running gates sequentially.
The mathematics behind the Bloch sphere: how the angles θ and φ map to quantum state vectors, why single-qubit gates are rotations, and how to read any single-qubit state geometrically.