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Correlated photon pairs from a warm atomic ensemble of Rubidium

Tommy Willis, Joint Quantum Institute, University of Maryland

(Session 5 : Friday from 5:00-7:00)

Abstract. We produce polarization-entangled correlated photon pairs from a warm atomic vapor of Rubidium using a spontaneous four-wave mixing interaction. In the experiment we apply two pump lasers (795 nm, 1324 nm) to the atomic ensemble and observe the cross-correlation function of two photons (780 nm, 1367 nm) emitted into the phase-matched direction. We see that the pairs have non-classical polarization correlation. The temporal and spectral character of the photon pairs can be modified by changing the absorption/dispersion of the atomic vapor at the wavelength of the generated pairs.