Topic
Clifford Group
0 courses · 3 tutorials
Free Tutorials
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- beginner
- 14 min read
Hadamard, S and T on the Bloch Sphere
The Hadamard gate is a half-turn about a diagonal axis, and S and T are partial twists about the vertical one. Seen on a live Bloch sphere, the H, S and T gates stop being matrices and start being furniture-moving.
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- advanced
- 22 min read
Fault-Tolerant Quantum Gates: Why T Gates Need Magic States
Physical vs logical gates, transversal Cliffords on the surface code, the Eastin-Knill obstruction, and the 15-to-1 magic state protocol that makes T gates fault-tolerant.
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- advanced
- 35 min
Randomized Benchmarking with Qiskit
Run randomized benchmarking protocols in Qiskit to measure average gate fidelity and diagnose systematic errors on real quantum hardware.