Genuine multipartite nonlocality and hierarchy of multipartite nonlocality

报告题目:Genuine multipartite nonlocality and hierarchy of multipartite nonlocality

报告人:C.H. Oh

Centre for Quantum Technologies and Physics Department, National University of Singapore, 2 Science Drive 3, Singapore 117542




We propose a hierarchy of Bell-type inequalities for arbitrary n-partite systems that identifies the different degrees of nonlocality ranging from standard to genuine multipartite nonlocality [Phys. Rev. A 94, 022110 (2016)]. We show that the observed joint probabilities in any nonsignaling m-local realistic models should satisfy the (m ? 1)th Bell-type inequality. When m = 2, the corresponding inequality reduces to the one shown earlier [Phys. Rev. Lett. 112, 140404 (2014)] whose violation indicates genuine multipartite nonlocality, and when m = n, the corresponding inequality is just Hardy’s inequality whose violation indicates standard multipartite nonlocality [Phys. Rev. Lett. 109, 120402 (2012)]. Furthermore, we find genuine multipartite nonlocality in the one-dimensional ferromagnetic spin-1/2 chain [Phys. Rev. A 96, 012336 (2017)].


Oh Choo Hiap obtained his BSc (First Class Hons) and PhD in physics in 1969 and 1972, respectively, from the University of Otago, New Zealand. For his PhD, he studied high energy physics, which relates to the study of the smallest constituents of matter. Choo Hiap has been with NUS since 1983, serving as Head of the Physics Department from 2000 to 2006. During this time he recruited various researchers in the field of quantum information, laying the foundation for CQT, of which he is a founding member.  His recent research is mainly on the fundamentals of quantum information science and the multiparticle phenomenology; he is a Fellow od American Physical Society. He was awarded an Emeritus Professorship by NUS in 2016.