2004/11/30 by Barak Dayan, Avi Pe’er, Avi pe'er +2 · 8 citations
Computer Science · Physics and Astronomy · #Mechanical and Optical Resonators #Quantum Information and Cryptography #Quantum optics and atomic interactions #physics.atom-ph #physics.optics #quant-ph
paper · pdf · doi:10.1103/physrevlett.94.043602
published as Phys. Rev. Lett. 94, 043602 (2005) · 4 pages, 2 figures, Accepted to Phys. Rev. Lett
arxiv created 2004/12/30 · openalex publication_date 2005/02/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We experimentally demonstrate sum-frequency generation with entangled photon pairs, generating as many as 40,000 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 can be applied to other nonlinear interactions, and may become useful for various quantum-measurement tasks.