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Bulletin of the American Physical Society

Correlation in photon pairs generated using four-wave mixing in a cold atomic ensemble

Andrew R. Ferdinand, Alejandro Manjavacas, F. E. Becerra

Published Jun 8, 2017• 0 citations
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Correlated light generated from atomic ensembles can have a central role in prominent quantum information protocols, such as long-distance quantum communication. Here we present our studies on three topics involving the generation of correlated light with four-wave mixing (FWM) in a cold atomic ensemble for applications in quantum communications with high capacity. We experimentally investigate the generation of light with seeded FWM in cold cesium atoms and the time correlations of photon pairs generated with spontaneous FWM. We theoretically investigate the correlations in orbital angular momentum of photon pairs generated with spontaneous FWM for a range of experimental geometries. These studies represent foundational work toward the control and measurement of high-dimensional entanglement in the orbital angular momentum degree of freedom photon pairs for use in high-dimensional quantum communication.
Generation of non-classical correlated photon pairs via spontaneous four-wave-mixing(FWM) in cold atomic ensembles is a promising field in quantum information process.In this paper we report on the realization of stimulated four-wave-mixing based on the cold 85Rb atoms,which is prepared in a magnetic-optical trap.We have observed the spatial distribution of the output parametric field,and briefly discussed how the intensities and frequencies of the three input beams affect this process.Temporal sequences modulation is used to control the interaction for the subsequent work of generating the non-classical correlated photon pairs.