Level 05

Noise & error correction

Why real qubits are fragile, and the clever codes that protect them.

6 lessons · Decoherence · Noise models · Error mitigation · Surface codes

  1. LessonComing soon

    Decoherence

    How the environment slowly steals quantum information.

  2. LessonComing soon

    Noise models

    Bit flips, phase flips and depolarising noise, in pictures.

  3. LessonComing soon

    Error mitigation

    Squeezing better answers out of today's noisy hardware.

  4. LessonComing soon

    The repetition code

    The simplest way to protect a qubit, and where it falls short.

  5. LessonComing soon

    Surface codes and logical qubits

    How many noisy qubits it takes to make one reliable one.

  6. CheckpointComing soon

    Checkpoint: noise and error correction

    A short quiz to lock it in before you move on.