Nonlinear interactions with an ultrahigh flux of broadband entangled photons

Details Nonlinear interactions with an ultrahigh flux of broadband entangled photons Nonlinear interactions with an ultrahigh flux of broadband entangled photons

2004-11-03

arxiv.org/abs/quant-ph/0411023v2

Phys. Rev. Lett. 94, 043602 (2005)

Physics

Quantum Physics

4 pages, 2 figures, Accepted to Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.94.043602

We experimentally demonstrate sum-frequency generation (SFG) with entangled photon-pairs, generating as many as 40,000 SFG photons per second, visible even to the naked eye. The nonclassical nature of the interaction is exhibited by a linear intensity-dependence of the nonlinear process. The key element in our scheme is the generation of an ultrahigh flux of entangled photons while maintaining their nonclassical properties. This is made possible by generating the down-converted photons as broadband as possible, orders of magnitude wider than the pump. This approach is readily applicable for other nonlinear interactions, and may be applicable for various quantum-measurement tasks.

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