Noncausal Superluminal Nonlocal Signalling

We prove that quantum nonlocality is intrinsically noncausal by means of a thought-experiment in which usable superluminal signals are nonlocally transmitted. This contrasts with the general belief that the randomness in correlated measurements always ensures that nonlocality is effectively causal. The key ideas of the experiment are: (1) to polarize the correlated particle pairs leaving the source; (2) that an observer measures the probability of the photon emerging in a given channel of the detector, rather than the correlation of his measurements with those of the second observer.