Violation of Bell’s Inequality with Photons from Independent Sources

作者：T. B. Pittman, J. D. Franson · 发表于：Physical Review Letters · 年份：2003 · DOI：10.1103/physrevlett.90.240401 · 被引用次数：74 · 研究领域：Quantum Mechanics and Applications、Quantum Information and Cryptography、Orbital Angular Momentum in Optics

We report a violation of Bell's inequality using one photon from a parametric down-conversion source and a second photon from an attenuated laser beam. The two photons were entangled at a beam splitter using the postselection technique of Shih and Alley [Phys. Rev. Lett. 61, 2921 (1988)]]. A quantum interference pattern with a visibility of 91% was obtained using the photons from these independent sources, as compared with a visibility of 99.4% using two photons from a central parametric down-conversion source.