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Statements

Subject Item
n2:RIV%2F61989592%3A15310%2F13%3A33144656%21RIV14-GA0-15310___
rdf:type
skos:Concept n16:Vysledek
dcterms: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.
dcterms:title
Efficient Experimental Estimation of Fidelity of Linear Optical Quantum Toffoli Gate Efficient Experimental Estimation of Fidelity of Linear Optical Quantum Toffoli Gate
skos:prefLabel
Efficient Experimental Estimation of Fidelity of Linear Optical Quantum Toffoli Gate Efficient Experimental Estimation of Fidelity of Linear Optical Quantum Toffoli Gate
skos:notation
RIV/61989592:15310/13:33144656!RIV14-GA0-15310___
n16:predkladatel
n17:orjk%3A15310
n3:aktivita
n10:P
n3:aktivity
P(EE2.3.30.0004), P(GA13-20319S)
n3:cisloPeriodika
16
n3:dodaniDat
n14:2014
n3:domaciTvurceVysledku
n5:1290592 n5:8991081 n5:1153048 n5:7926251 n5:4555201 n5:6573053 n5:2504499
n3:druhVysledku
n6:J
n3:duvernostUdaju
n20:S
n3:entitaPredkladatele
n9:predkladatel
n3:idSjednocenehoVysledku
72065
n3:idVysledku
RIV/61989592:15310/13:33144656
n3:jazykVysledku
n13:eng
n3:klicovaSlova
Toffoli gate; linear optical quantum; fidelity; efficient experimental estimation
n3:klicoveSlovo
n15:fidelity n15:linear%20optical%20quantum n15:Toffoli%20gate n15:efficient%20experimental%20estimation
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[0F72AF20CD37]
n3:nazevZdroje
Physical Review Letters
n3:obor
n18:BH
n3:pocetDomacichTvurcuVysledku
7
n3:pocetTvurcuVysledku
7
n3:projekt
n4:GA13-20319S n4:EE2.3.30.0004
n3:rokUplatneniVysledku
n14:2013
n3:svazekPeriodika
111
n3:tvurceVysledku
Fiurášek, Jaromír Straka, Ivo Sedlák, Michal Miková, Martina Dušek, Miloslav Mičuda, Michal Ježek, Miroslav
n3:wos
000326147800004
s:issn
0031-9007
s:numberOfPages
5
n11:doi
10.1103/PhysRevLett.111.160407
n19:organizacniJednotka
15310