Measurement-dependence cost for Bell nonlocality: Causal versus retrocausal models
Measurement-dependence cost for Bell nonlocality: Causal versus retrocausal models
Device-independent protocols based on Bell nonlocality, such as quantum key distribution and randomness generation, must ensure no adversary can have prior knowledge of the measurement outcomes. This requires a measurement independence assumption: that the choice of measurement is uncorrelated with any other underlying variables that influence the measurement outcomes. Conversely, …