Demonstration of controllable temporal distinguishability in a three-photon state
Bi‐Heng Liu, Fang‐Wen Sun, Yan-Xiao Gong, Yun‐Feng Huang, Z. Y. Ou, Guang‐Can Guo · Europhysics Letters (EPL) · 2007
By using two processes of parametric down-conversion, we are able to generate three photons with controllable degree of temporal distinguishability. This is confirmed by the visibility in a three-photon interference experiment, which can be generalized to provide a practical technique for characterizing the temporal distinguishability of a multi-photon state. This method of quantitative description of multi-photon indistinguishability will have practical implications in the implementation of quantum information protocols.