Toward quantum frequency combs: Boosting the generation of highly nonclassical light states by cavity-enhanced parametric down-conversion at high repetition rates

Year: 2008

Authors: Zavatta A., Parigi V., Bellini M.

Autors Affiliation: CNR – Istituto Nazionale di Ottica Applicata, Largo E. Fermi 6, 50125 Firenze, Italy;
Department of Physics, University of Florence, I-50019 Sesto Fiorentino, Florence, Italy;
LENS, Via Nello Carrara 1, 50019 Sesto Fiorentino, Florence, Italy

Abstract: We demonstrate the generation of multiphoton quantum states of light by cavity-enhanced parametric downconversion in the high-repetition-rate pulsed regime. An external enhancement cavity resonant with the spectral comb of modes of a mode-locked pump laser provides a coherent buildup of the pump intensity and greatly enhances the parametric gain without sacrificing its high repetition rate and comb structure. We probe the parametric gain enhancement by the conditional generation and tomographic analysis of two-photon Fock states. Besides its potential impact for efficiently generating highly nonclassical or entangled multiphoton states in many existing experimental setups, this scheme opens exciting perspectives toward the combination of quantum and comb technologies for enhanced measurements and advanced quantum computation protocols.


Volume: 78 (3)      Pages from: 033809-1  to: 033809-4

More Information: This work was partially supported by Ente Cassa di Risparmio di Firenze and by CNR-RSTL Projects.
KeyWords: Computational linguistics; Computer networks; Pumps; Quantum computers, High repetition rates; Parametric down-conversion; Parametric gains, Pumping (laser)
DOI: 10.1103/PhysRevA.78.033809

Citations: 13
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