报告人：C. H. Oh

                 Professor, Centre for Quantum Technologies and Physics Department,

        National University of Singapore

报告时间：2019年6月21日 上午10：30

报告地点：知新楼C1011

邀请人： 仝殿民

报告摘要：

The quantum contextuality becomes experimentally testable due to the discovery of the so called the Kochen-Specker inequalities, which include Bell-inequalities as special cases since locality can be understood as a space-like-separation-enforced non-contextuality. In the past ten years this fascinating nonclassical feature has been verified in many experiments on photons, trapped ions, and neutrons and so on. The quantum contextuality as revealed by Kochen-Specker theorem should manifest itself in any state of a system with more than 2 distinguishable states. However for the simplest system capable of exhibiting quantum contextuality namely a qutrit, only a state-dependent test has been done most recently. The main obstacle to a state-independent verification of quantum contextuality for qutrits is that too many observables, e.g., at least 31, are involved in all the known state-independent tests. In this talk, we will discuss contextuality and provide a state-independent proof of KS theorem using only 13 rays determined by 26 points on the surface of a magic cube.

报告人简介：

Prof. Oh was the former Head of Physics Department, National University of Singapore, and is a Fellow of APS. His research interests include quantum information and computation, quantum algebra and Yang-Baxter equations, Yang-Mills gauge field theories and Chern-Simons theories, and dual resonance models in high energy physics.

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