Post-quantum steering

Post-quantum steering

Seminar author:Ana Belen Sainz

Event date and time:05/19/2015 02:30:pm

Event location:IFAE Seminar room

Event contact:

The discovery of post-quantum nonlocality, i.e. the existence of nonlocal correlations stronger than any quantum correlations but nevertheless consistent with the no-signaling principle, has deepened our understanding of the foundations quantum theory. In this work, we investigate whether the phenomenon of Einstein-Podolsky-Rosen steering, a different form of quantum nonlocality, can also be generalized beyond quantum theory. While post-quantum steering does not exist in the bipartite case, we prove its existence in the case of three observers. Importantly, we show that post-quantum steering is a genuinely new phenomenon, fundamentally different from post-quantum nonlocality. Our results provide new insight into the nonlocal correlations of multipartite quantum systems.