Quantum interference by two temporally distinguishable pulses
Yoon-Ho Kim, Maria V. Chekhova, Sergei P. Kulik, Yanhua Shih, Timothy E. Keller, Morton H. Rubin
Abstract
We report a two-photon interference effect, in which the entangled photon pairs are generated from two laser pulses well-separated in time. In a single pump pulse case, interference effects did not occur in our experimental scheme. However, by introducing a second pump pulse delayed in time, quantum interference was then observed. The visibility of the interference fringes shows dependence on the delay time between two laser pulses. The results are explained in terms of indistinguishability of biphoton amplitudes which originated from two temporally separated laser pulses.
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