Quantifying the nonlocality of GHZ quantum correlations by a bounded communication simulation protocol

Understand

The simulation of quantum correlations with alternative nonlocal resources, such as classical communication, gives a natural way to quantify their nonlocality.

• While multipartite nonlocal correlations appear to be useful resources, very little is known on how to simulate multipartite quantum correlations.
• We present the first known protocol that reproduces 3-partite GHZ correlations with bounded communication: 3 bits in total turn out to be sufficient to simulate all equatorial Von Neumann measurements on the 3-partite GHZ state.