Noise and Errors

NISQ reality, noise models and fake backends, error mitigation, and the idea of error correction.

4 lessons12 exercises48 min

1. 01NISQ realityDecoherence, gate errors and readout errors: the three ways a real device disagrees with the simulator.12 min
2. 02Noise models and fake backendsHow a simulator imitates a device: depolarising, thermal relaxation and readout channels built from calibration data.12 min
3. 03Error mitigationCheaper than correction: readout calibration, zero-noise extrapolation, and what mitigation cannot do.10 min
4. 04Error correction in one lessonThe three-qubit repetition code, syndromes, and the road to a logical qubit.14 min