Figure 2

(a) Local spin measurements on A and B are used to test for nonlocality via a violation of the CHSH inequality, using the quantum state described in Eq. (1). Only if the measurement result of particle C is known, the data set violates Bell’s notion of locality. (b) Example of a possible measurement sequence, according to (4) for \(\phi '=0\). In each subsystem, all events occur randomly. Ordering the events in AB according to the result obtained by C, and measuring different combinations of local detector settings, reveals the nonlocal nature of the acquired data