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.
|Titolo:||Temporal indistinguishability and quantum interference|
|Data di pubblicazione:||2000|
|Digital Object Identifier (DOI):||10.1103/PhysRevA.62.043820|
|Appare nelle tipologie:||1.1 Articolo in rivista|