报告题目：Quantum Simulations and Quantum Measurements via Quantum Walks

报 告 人：Peng Xue，Southeast University

报告时间：2015年4月22日18：30

报告地点：理科楼C109

报告摘要：We experimentally investigate a photonic quantum walk (QW) and observe typical phenomena known from the wave propagation in periodic structures as ballistic spreading. We introduce site-dependent phase defects to the QW which is realized by adding fully controllable polarization-independent phase shifters and observe localization and Bloch oscillations of the photons for moderate as well as Landau-Zener tunneling for strong phase gradients. By introducing site-dependent coin operation we can realize generalized measurements via a 1D photonic QW by implementing two examples, including unambiguous state discrimination of two equally probable single-qubit states and symmetric informationally complete positive operator value measurement on a single qubit.