Implementation of linear-optical controlled-phase gate with programmable phase shift

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Implementation of linear-optical controlled-phase gate with programmable phase shift

Popis výsledku v původním jazyce

This reasearch report summarizes the implementation of a tunable optical controlled-phase gate with a programmable phase was carried out. The reactivation and precise alignment of a three-photon source were performed. The source was based on the generation of two photons via spontaneous parametric down-conversion in a BBO crystal and a third photon obtained by attenuating the fundamental component of the pump laser. The setup was configured as a primary source of correlated photon pairs with tunable separability in time and polarization. The optimization of the source was achieved by observing the Hong–Ou–Mandel effect. The photons were directed onto a beam splitter and detected in separate detectors in coincidence measurements. Depending on the relative temporal delay between the photons, an interference dip with visibility of up to 96% was observed, confirming high-quality spatial, temporal, and polarization overlap. The source was subsequently employed in an experimental branch for measurements of three-photon interference with a pump beam of tunable polarization.

Název v anglickém jazyce

Implementation of linear-optical controlled-phase gate with programmable phase shift

Popis výsledku anglicky

This reasearch report summarizes the implementation of a tunable optical controlled-phase gate with a programmable phase was carried out. The reactivation and precise alignment of a three-photon source were performed. The source was based on the generation of two photons via spontaneous parametric down-conversion in a BBO crystal and a third photon obtained by attenuating the fundamental component of the pump laser. The setup was configured as a primary source of correlated photon pairs with tunable separability in time and polarization. The optimization of the source was achieved by observing the Hong–Ou–Mandel effect. The photons were directed onto a beam splitter and detected in separate detectors in coincidence measurements. Depending on the relative temporal delay between the photons, an interference dip with visibility of up to 96% was observed, confirming high-quality spatial, temporal, and polarization overlap. The source was subsequently employed in an experimental branch for measurements of three-photon interference with a pump beam of tunable polarization.

Druh

V_souhrn - Souhrnná výzkumná zpráva

CEP obor

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OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

U - Předmět řešení projektu je utajovanou skutečností podle zvláštních právních předpisů nebo je skutečností, jejíž zveřejnění by mohlo ohrozit činnost zpravodajské služby. Údaje o projektu jsou upraveny tak, aby byly zveřejnitelné

Počet stran výsledku

10

Místo vydání

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Název nakladatele resp. objednatele

PřF UP v Olomouci

Verze

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