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Entangling efficiency of linear-optical quantum gates
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SYSNO ASEP 0387506 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Entangling efficiency of linear-optical quantum gates Author(s) Lemr, Karel (FZU-D) RID
Černoch, Antonín (FZU-D) RID, ORCID
Soubusta, Jan (FZU-D) RID, ORCID
Dušek, M. (CZ)Source Title Physical Review. A. - : American Physical Society - ISSN 1050-2947
Roč. 86, č. 3 (2012), "032321-1"-"032321-5"Number of pages 5 s. Language eng - English Country US - United States Keywords linear-optical quantum gates ; quantum physics Subject RIV BH - Optics, Masers, Lasers R&D Projects GAP205/12/0382 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z10100522 - FZU-D (2005-2011) UT WOS 000308863300007 DOI 10.1103/PhysRevA.86.032321 Annotation We propose a measure of the nonclassicality of quantum gates which is particularly suitable for probabilistic devices. This measure enables to compare deterministic devices which prepare entangled states with a low amount of entanglement with probabilistic devices which generate highly entangled states but which fail sometimes. We provide examples demonstrating the advantages of this measure over the so-far employed entangling power. The experimentally determined entangling efficiency of a tunable linear-optical controlled-phase gate is presented to highlight the practical aspects of this measure. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2013
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