Abstract

A double-slit ghost interference experiment performed on an entangled resource using type-II non-collinear degenerate spontaneous parametric down-conversion (SPDC) is demonstrated. The influence of the distance between the double-slit and the bucket detector preceded by a pinhole is studied. The experimental results show that the interference fringes become increasingly distinct with higher visibility when the pinhole-double-slit distance increases. A first-order classical theory based on the Klyshko's two-photon advanced-wave picture, and a second-order quantum-image theory are provided for explanations. The fitting results indicate that the divergence of the converted fluorescence significantly affects the ghost fringes.

© 2013 Chinese Optics Letters

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