Postquantum steering


Sainz, A.B. (2016). Postquantum steering. Perimeter Institute. https://pirsa.org/16020092


Sainz, Ana Belen. Postquantum steering. Perimeter Institute, Feb. 02, 2016, https://pirsa.org/16020092


          @misc{ pirsa_PIRSA:16020092,
            doi = {10.48660/16020092},
            url = {https://pirsa.org/16020092},
            author = {Sainz, Ana Belen},
            keywords = {Quantum Foundations},
            language = {en},
            title = {Postquantum steering},
            publisher = {Perimeter Institute},
            year = {2016},
            month = {feb},
            note = {PIRSA:16020092 see, \url{https://pirsa.org}}

Ana Belen Sainz Gdańsk University of Technology


The discovery of postquantum 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 postquantum 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 postquantum nonlocality. Our results provide new insight into the nonlocal correlations of multipartite quantum systems.