Stefan Ludescher: Theory-independent randomness generation from spacetime - RQI Circuit Vienna 2023

Title: Theory-independent randomness generation from spacetime symmetries
Abstract: We introduce a class of semi-device-independent protocols based on the breaking of spacetime symmetries. In particular, we characterise how the response of physical systems to spatial rotations constrains the probabilities of events that may be observed: in our setup, the set of quantum correlations arises from rotational symmetry without assuming quantum physics. On a practical level, our results allow for the generation of secure random numbers without trusting the devices or assuming quantum theory. On a fundamental level, we open a theory-agnostic framework for probing the interplay between probabilities of events (as prevalent in quantum mechanics) and the properties of spacetime (as prevalent in relativity).
Talk delivered at IQOQI Vienna on November 10th 2023.
Broadcast and editing by Rick Perche.