科研之友
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摘要
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.
