Trávníček, Vojtěch
Construction and characterization of a three-photon source [rukopis] / Vojtěch Trávníček. -- 2017. -- 49 : grafy, schémata, tab. -- Oponent Jan Soubusta. -- Ved. práce Karel Lemr. -- Abstrakt: In this thesis, we develop a simple model describing inherent photon-number noise in Rarity-Tapster type interferometers. This noise is caused by generating photon pairs in the process of spontaneous parametric down-conversion and adding a third photon by attenuating fundamental laser mode to single-photon level. We experimentally verify our model and present resulting signal to noise ratios as well as obtained three-photon generation rates as functions of various setup parameters. Subsequently we evaluate impact of this particular source of noise on quantum teleportation which is a key quantum information protocol using this interferometric configuration. Finally, we test our model on simple case of Hong-Ou-Mandel interference.. -- Abstrakt: In this thesis, we develop a simple model describing inherent photon-number noise in Rarity-Tapster type interferometers. This noise is caused by generating photon pairs in the process of spontaneous parametric down-conversion and adding a third photon by attenuating fundamental laser mode to single-photon level. We experimentally verify our model and present resulting signal to noise ratios as well as obtained three-photon generation rates as functions of various setup parameters. Subsequently we evaluate impact of this particular source of noise on quantum teleportation which is a key quantum information protocol using this interferometric configuration. Finally, we test our model on simple case of Hong-Ou-Mandel interference.
Soubusta, Jan. Lemr, Karel. Univerzita Palackého. Katedra experimentální fyziky
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