Experimental Implementation of Optimal Linear-Optical Controlled-Unitary Gates

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F15%3A33154352" target="_blank" >RIV/61989592:15310/15:33154352 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/15:00449061

Výsledek na webu

<a href="http://journals.aps.org/prl/pdf/10.1103/PhysRevLett.114.153602" target="_blank" >http://journals.aps.org/prl/pdf/10.1103/PhysRevLett.114.153602</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevLett.114.153602" target="_blank" >10.1103/PhysRevLett.114.153602</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Experimental Implementation of Optimal Linear-Optical Controlled-Unitary Gates

Popis výsledku v původním jazyce

We show that it is possible to reduce the number of two-qubit gates needed for the construction of an arbitrary controlled-unitary transformation by up to 2 times using a tunable controlled-PHASE gate. On the platform of linear optics, where two-qubit gates can only be achieved probabilistically, our method significantly reduces the amount of components and increases success probability of a two-qubit gate. The experimental implementation of our technique presented in this Letter for a controlled single-qubit unitary gate demonstrates that only one tunable controlled-PHASE gate is needed instead of two standard controlled-NOT gates. Thus, not only do we increase the success probability by about 1 order of magnitude (with the same resources), but also avoid the need for conducting quantum nondemolition measurement otherwise required to join two probabilistic gates. Subsequently, we generalize our method to a higher order, showing that n-times controlled gates can be optimized by replaci

Název v anglickém jazyce

Experimental Implementation of Optimal Linear-Optical Controlled-Unitary Gates

Popis výsledku anglicky

We show that it is possible to reduce the number of two-qubit gates needed for the construction of an arbitrary controlled-unitary transformation by up to 2 times using a tunable controlled-PHASE gate. On the platform of linear optics, where two-qubit gates can only be achieved probabilistically, our method significantly reduces the amount of components and increases success probability of a two-qubit gate. The experimental implementation of our technique presented in this Letter for a controlled single-qubit unitary gate demonstrates that only one tunable controlled-PHASE gate is needed instead of two standard controlled-NOT gates. Thus, not only do we increase the success probability by about 1 order of magnitude (with the same resources), but also avoid the need for conducting quantum nondemolition measurement otherwise required to join two probabilistic gates. Subsequently, we generalize our method to a higher order, showing that n-times controlled gates can be optimized by replaci

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BH - Optika, masery a lasery

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review Letters

ISSN

0031-9007

e-ISSN

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Svazek periodika

114

Číslo periodika v rámci svazku

15

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

"153602-1"-"153602-5"

Kód UT WoS článku

000352990700004

EID výsledku v databázi Scopus

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