About: Process-fidelity estimation of a linear optical quantum-controlled-Z gate: A comparative study

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About: Process-fidelity estimation of a linear optical quantum-controlled-Z gate: A comparative study Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://journals.aps.org/pra/pdf/10.1103/PhysRevA.89.042304
Description	We present a systematic comparison of different methods of fidelity estimation of a linear optical quantumcontrolled-Z gate implemented by two-photon interference on a partially polarizing beam splitter. We utilize a linear fidelity estimator based on the Monte Carlo sampling technique as well as a nonlinear estimator based on maximum likelihood reconstruction of a full quantum-process matrix. In addition, we evaluate the lower bound on quantum-gate fidelity determined by average quantum-state fidelities for two mutually unbiased bases. In order to probe various regimes of operation of the gate we introduce a tunable time delay between the two photons. This allows us to move from high-fidelity operation to a regime where the photons become distinguishable and the success probability of the scheme significantly depends on the input state. We discuss in detail possible systematic effects that could influence the gate-fidelity estimation. We present a systematic comparison of different methods of fidelity estimation of a linear optical quantumcontrolled-Z gate implemented by two-photon interference on a partially polarizing beam splitter. We utilize a linear fidelity estimator based on the Monte Carlo sampling technique as well as a nonlinear estimator based on maximum likelihood reconstruction of a full quantum-process matrix. In addition, we evaluate the lower bound on quantum-gate fidelity determined by average quantum-state fidelities for two mutually unbiased bases. In order to probe various regimes of operation of the gate we introduce a tunable time delay between the two photons. This allows us to move from high-fidelity operation to a regime where the photons become distinguishable and the success probability of the scheme significantly depends on the input state. We discuss in detail possible systematic effects that could influence the gate-fidelity estimation. (en)
Title	Process-fidelity estimation of a linear optical quantum-controlled-Z gate: A comparative study Process-fidelity estimation of a linear optical quantum-controlled-Z gate: A comparative study (en)
skos:prefLabel	Process-fidelity estimation of a linear optical quantum-controlled-Z gate: A comparative study Process-fidelity estimation of a linear optical quantum-controlled-Z gate: A comparative study (en)
skos:notation	RIV/61989592:15310/14:33149933!RIV15-MSM-15310___
http://linked.open...avai/riv/aktivita	P S
http://linked.open...avai/riv/aktivity	P(EE2.3.30.0004), P(GA13-20319S), S
http://linked.open...iv/cisloPeriodika	4
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Fiurášek, Jaromír Sedlák, Michal Ježek, Miroslav Straka, Ivo Mičuda, Michal Dušek, Miloslav Miková, Martina
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Palackého v Olomouci / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	39935
http://linked.open...ai/riv/idVysledku	RIV/61989592:15310/14:33149933
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	study; comparative; gate; quantum-controlled-Z; optical; linear; estimation; Process-fidelity (en)
http://linked.open.../riv/klicoveSlovo	estimation optical linear study comparative gate Process-fidelity quantum-controlled-Z
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[C096CADFECB1]
http://linked.open...i/riv/nazevZdroje	Physical Review A
http://linked.open...in/vavai/riv/obor	BH
http://linked.open...ichTvurcuVysledku	7 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	Optické kvantové zpracování informace pomocí slabých kvantových měření POST-UP
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	89
http://linked.open...iv/tvurceVysledku	Fiurášek, Jaromír Ježek, Miroslav Dušek, Miloslav Mičuda, Michal Straka, Ivo Sedlák, Michal Miková, Martina
http://linked.open...ain/vavai/riv/wos	000333990800003
issn	1050-2947
number of pages	10 (xsd:int)
http://bibframe.org/vocab/doi	10.1103/PhysRevA.89.042304
http://localhost/t...ganizacniJednotka	15310

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