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Experimental implementation of the optimal linear-optical controlled phase gate
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SYSNO ASEP 0364431 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Experimental implementation of the optimal linear-optical controlled phase gate Author(s) Lemr, K. (CZ)
Černoch, Antonín (FZU-D) RID, ORCID
Soubusta, Jan (FZU-D) RID, ORCID
Kieling, K. (DE)
Eisert, J. (DE)
Dušek, M. (CZ)Source Title Physical Review Letters. - : American Physical Society - ISSN 0031-9007
Roč. 106, č. 3 (2011), 013602/1-013602/4Number of pages 4 s. Language eng - English Country US - United States Keywords optical implementations of quantum information processing and transfer ; quantum computation Subject RIV BH - Optics, Masers, Lasers R&D Projects 1M06002 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z10100522 - FZU-D (2005-2011) UT WOS 000286750500002 DOI 10.1103/PhysRevLett.106.013602 Annotation We report on the first experimental realization of optimal linear-optical controlled phase gates for arbitrary phases. The realized scheme is entirely flexible in that the phase shift can be tuned to any given value. All such controlled phase gates are optimal in the sense that they operate at the maximum possible success probabilities that are achievable within the framework of postselected linear-optical implementations with vacuum ancillas. The quantum gate is implemented by using bulk optical elements and polarization encoding of qubit states. We have experimentally explored the remarkable observation that the optimum success probability is not monotone in the phase. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2012
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