About: Efficient Experimental Estimation of Fidelity of Linear Optical Quantum Toffoli Gate

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	We propose an efficiently measurable lower bound on quantum process fidelity of N-qubit controlled-Z gates. This bound is determined by average output state fidelities for N partially conjugate product bases. A distinct advantage of our approach is that only fidelities with product states need to be measured while keeping the total number of measurements much smaller than what is necessary for full quantum process tomography. As an application, we use this method to experimentally estimate quantum process fidelity F of a three-qubit linear optical quantum Toffoli gate and we find that F 0:83. We also demonstrate the entangling capability of the gate by preparing Greenberger-Horne-Zeilinger-type three-qubit entangled states from input product states. We propose an efficiently measurable lower bound on quantum process fidelity of N-qubit controlled-Z gates. This bound is determined by average output state fidelities for N partially conjugate product bases. A distinct advantage of our approach is that only fidelities with product states need to be measured while keeping the total number of measurements much smaller than what is necessary for full quantum process tomography. As an application, we use this method to experimentally estimate quantum process fidelity F of a three-qubit linear optical quantum Toffoli gate and we find that F 0:83. We also demonstrate the entangling capability of the gate by preparing Greenberger-Horne-Zeilinger-type three-qubit entangled states from input product states. (en)
Title	Efficient Experimental Estimation of Fidelity of Linear Optical Quantum Toffoli Gate Efficient Experimental Estimation of Fidelity of Linear Optical Quantum Toffoli Gate (en)
skos:prefLabel	Efficient Experimental Estimation of Fidelity of Linear Optical Quantum Toffoli Gate Efficient Experimental Estimation of Fidelity of Linear Optical Quantum Toffoli Gate (en)
skos:notation	RIV/61989592:15310/13:33144656!RIV14-GA0-15310___
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(EE2.3.30.0004), P(GA13-20319S)
http://linked.open...iv/cisloPeriodika	16
http://linked.open...vai/riv/dodaniDat	2014
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	72065
http://linked.open...ai/riv/idVysledku	RIV/61989592:15310/13:33144656
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Toffoli gate; linear optical quantum; fidelity; efficient experimental estimation (en)
http://linked.open.../riv/klicoveSlovo	fidelity Toffoli gate efficient experimental estimation linear optical quantum
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[0F72AF20CD37]
http://linked.open...i/riv/nazevZdroje	Physical Review Letters
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	2013
http://linked.open...v/svazekPeriodika	111
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	000326147800004
issn	0031-9007
number of pages	5 (xsd:int)
http://bibframe.org/vocab/doi	10.1103/PhysRevLett.111.160407
http://localhost/t...ganizacniJednotka	15310

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