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Journal Article

Temporal indistinguishability and quantum interference

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Kim, Y., Berardi, V., Chekhova, M., Garuccio, A., & Shih, Y. (2000). Temporal indistinguishability and quantum interference. PHYSICAL REVIEW A, 62(4): 043820. doi:10.1103/PhysRevA.62.043820.

Cite as: https://hdl.handle.net/21.11116/0000-0001-DF96-B
A chi((2)) nonlinear optical crystal is pumped by two temporally well-distinguishable femtosecond laser pulses to generate entangled photon pairs in the process of spontaneous parametric down-conversion. We have observed first- and second-order interference between amplitudes generated from the first and the second pump pulse as a function of the time delay between the two pump pulses. The criteria for first- and second-order interference are found to be very different, which reflect the quantum entanglement nature of the state of spontaneous parametric down-conversion.