title: Revisiting the which-way experiment with twisted light beams.
abstract: We report an experiment of which-way information and a quantum eraser based on polarization-controlled interference of two twisted light beams carrying high orbital angular momentum (OAM) up to ℓ=±50 and ±100, respectively. By changing the polarization plane of one OAM beam from 0° to 90° with respect to that of the other OAM beam, we observe the gradual disappearance of the interference petal-like patterns into the noninterference single bright rings. Subsequently, we use the eraser of a diagonal polarizer to retrieve the characteristic petal-like interference. The experimental results can be well explained in the frame of single-photon Greenberger-Horne-Zeilinger-like (GHZ-like) entanglement. Our work may be beneficial to understanding the wave-particle duality of light.
authors.forename: Lixiang
authors.initials: L
authors.lastname: Chen
authors.forename: Wuhong
authors.initials: W
authors.lastname: Zhang
authors.forename: Kai
authors.initials: K
authors.lastname: Cai
authors.forename: Yuanying
authors.initials: Y
authors.lastname: Zhang
authors.forename: Qianqian
authors.initials: Q
authors.lastname: Qi