2022/02/13 by Sang-Bae Kim, Kim, Sangbae, Byoung S. Ham +1
Computer Science · Physics and Astronomy · Engineering · #Quantum Information and Cryptography #Quantum optics and atomic interactions #Photonic and Optical Devices
paper · pdf · doi:10.48550/arxiv.2202.06168
Quantum superposition is the cornerstone of quantum mechanics, where interference fringes originate in the self-interference of a single photon via indistinguishable photon characteristics. Wheeler delayed-choice experiments have been extensively studied for the wave-particle duality over the last several decades to understand the complementarity theory of quantum mechanics. The heart of the delayed-choice quantum eraser is in the mutually exclusive quantum feature violating the cause-effect relation. Here, we experimentally demonstrate the quantum eraser using coherent photon pairs by the delayed choice of a polarizer placed out of the interferometer. Coherence solutions of the observed quantum eraser are derived from a typical Mach-Zehnder interferometer, where the violation of the cause-effect relation is due to selective measurements of basis choice.