Erlangen 2018 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 51: Poster: Quantum Optics and Photonics IV
Q 51.62: Poster
Wednesday, March 7, 2018, 16:15–18:15, Redoutensaal
Entangled Photons Recombination from Broadband Parametric Down Conversion — •Hani Abou Hadba1,2,3, Kirill Spasibko2,3, and Maria chekhova2,3 — 1School of Advanced Optical Technologies SAOT, Erlangen, Germany — 2Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany — 3Max-Planck-Institut für die Physik des Lichts, Erlangen Germany
Parametric down-conversion (PDC) is widely used as a source of entangled photon pairs, which have numerous applications in quantum optics and quantum information. The reverse process to PDC is the sum frequency generation (SFG): while in PDC a pump photon decays into a photon pair, in SFG two photons recombine into one. This process is referred to as the pump re-construction as it gives arise, apart from a broad spectral background, to a narrow peak at exactly the pump wavelength. The background originates from photons belonging to different pairs.
In this work we study how the height of the recombination peak with respect to the back-ground depends on the number of entangled frequency modes. We show that the ratio between the peak and the background could be used as a measure of the number of modes and therefore a measure of entanglement.