title: Realization of Single-Qubit Positive-Operator-Valued Measurement via a One-Dimensional Photonic Quantum Walk.
abstract: We perform generalized measurements of a qubit by realizing the qubit as a coin in a photonic quantum walk and subjecting the walker to projective measurements. Our experimental technique can be used to realize, photonically, any rank-1 single-qubit positive-operator-valued measure via constructing an appropriate interferometric quantum-walk network and then projectively measuring the walker's position at the final step.
authors.affiliation: Department of Physics, Southeast University, Nanjing 211189, China.
authors.forename: Zhihao
authors.initials: Z
authors.lastname: Bian
authors.affiliation: Department of Physics, Southeast University, Nanjing 211189, China.
authors.forename: Jian
authors.initials: J
authors.lastname: Li
authors.affiliation: Department of Physics, Southeast University, Nanjing 211189, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Qin
authors.affiliation: Department of Physics, Southeast University, Nanjing 211189, China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Zhan
authors.affiliation: Department of Physics, Southeast University, Nanjing 211189, China.
authors.forename: Rong
authors.initials: R
authors.lastname: Zhang
authors.affiliation: Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei, Anhui 230026, China.|Shanghai Branch, CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Shanghai 201315, China.|Institute for Quantum Science and Technology, University of Calgary, Alberta T2N 1N4, Canada.|Program in Quantum Information Science, Canadian Institute for Advanced Research, Toronto, Ontario M5G 1Z8, Canada.
authors.forename: Barry C
authors.initials: BC
authors.lastname: Sanders
authors.affiliation: Department of Physics, Southeast University, Nanjing 211189, China.|State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China.|Beijing Institute of Mechanical and Electrical Space, Beijing 100094, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Xue