Comparison of linear optics quantum-computation control-sign gates with ancilla inefficiency and an improvement to functionality under these conditions

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Title Comparison of linear optics quantum-computation control-sign gates with ancilla inefficiency and an improvement to functionality under these conditions
Author Lund, Austin; Bell, T. B.; Ralph, T. C.
Journal Name Physical Review A (Atomic, Molecular and Optical Physics)
Year Published 2003
Place of publication Ridge, NY
Publisher American Physical Society
Abstract We compare three proposals for nondeterministic control-sign gates implemented using linear optics and conditional measurements with nonideal ancilla mode production and detection. The simplified Knill-Laflamme-Milburn gate [Ralph et al., Phys. Rev. A 65, 012314 (2001)] appears to be the most resilient under these conditions. We also find that the operation of this gate can be improved by adjusting the beam splitter ratios to compensate to some extent for the effects of the imperfect ancilla.
Peer Reviewed Yes
Published Yes
Publisher URI http://prola.aps.org/
Alternative URI http://dx.doi.org/10.1103/PhysRevA.68.022313
Copyright Statement Copyright 2003 American Physical Society. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
Volume 68
Issue Number 2
Page from 022313-1
Page to 022313-6
ISSN 1050-2947
Date Accessioned 2009-12-01
Language en_AU
Faculty Faculty of Science, Environment, Engineering and Technology
Subject PRE2009-Cross discipline
URI http://hdl.handle.net/10072/27361
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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