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Entangled Two-Photon Wave Packet in a Dispersive Medium

Alejandra Valencia, Maria V. Chekhova, Alexei Trifonov, Yanhua Shih

quant-pharXiv:quant-ph/0407201

Abstract

We report an experimental study of group-velocity dispersion effect on an entangled two-photon wavepacket, generated via spontaneous parametric down-conversion and propagating through a dispersive medium. Even in the case of using CW laser beam for pump, the biphoton wavepacket and the second-order correlation function spread significantly. The study and understanding of this phenomenon is of great importance for quantum information applications, such as quantum communication and distant clock synchronization.

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