Semi-device-independent certification of independent quantum state and measurement devices

Understand

Certifying that quantum devices behave as intended is crucial for quantum information science.

• Here, methods are developed for certification of both state preparation devices and measurement devices based on prepare-and-measure experiments with independent devices.
• The experimenter assumes the independence of the devices and knowledge of the Hilbert space dimension.
• Thus no precise characterisation of any part of the experiment is required.