One- and two-photon quantum interferences in parametric four-wave mixing.
We report the observation of the interferometric response in parametric four-wave mixing in rubidium atoms excited by a pair of ultrashort pulses. For pulses with orthogonal polarizations and in the presence of the two-photon transition 5S-5D reveals a one-photon quantum interference, in contrast to the optical interference observed when the pulses have parallel polarization. For opposite circular polarizations no interference is observed in the fluorescence of the two-photon transition, in contrast to the one- and two-photon interferences exhibited in the nonlinear process.
Ferraz
J
J
Departamento de Física, Universidade Federal de Pernambuco, 50670-901 Recife, PE, Brazil.
Acioli
L H
LH
Vianna
S S
SS