Quantum frequency downconversion experiment

Details Quantum frequency downconversion experiment Quantum frequency downconversion experiment

2010-06-02

arxiv.org/abs/1006.0364v1

Phys. Rev. A 82, 013833 (2010)

Physics

Quantum Physics

4 pages, 6 figures

Scientific paper

10.1103/PhysRevA.82.013833

We report the first quantum frequency downconversion experiment. Using the difference frequency generation process in a periodically poled lithium niobate waveguide, we successfully observed the phase-preserved frequency downconversion of a coherent pulse train with an average photon number per pulse of $<$1, from the 0.7-$\mu$m visible wavelength band to the 1.3-$\mu$m telecom band. We expect this technology to become an important tool for flexible photonic quantum networking, including the realization of quantum repeater systems over optical fiber using atom-photon entanglement sources for the visible wavelength bands.

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