One-Sided Device-Independent Certification of Unbounded Random Numbers

Understand

The intrinsic non-locality of correlations in Quantum Mechanics allow us to certify the behaviour of a quantum mechanism in a device independent way.

• In particular, we present a new protocol that allows an unbounded amount of randomness to be certified as being legitimately the consequence of a measurement on a quantum state.
• By using a sequence of non-projective measurements on single state, we show a more robust method to certify unbounded randomness than the protocol of Churchod et al., by moving to a one-sided device independent scenario.
• This protocol also does not assume any specific behaviour of the adversary trying to fool the participants in the protocol, which is an advantage over previous steering based protocols.