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

Lund, A. P., Bell, T. B. and Ralph, T. C. (2003) Comparison of linear optics quantum-computation control-sign gates with ancilla inefficiency and an improvement to functionality under these conditions. Physical Review A, 68 2: 022313-1-022313-16. doi:10.1103/PhysRevA.68.022313

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Author Lund, A. P.
Bell, T. B.
Ralph, T. C.
Title Comparison of linear optics quantum-computation control-sign gates with ancilla inefficiency and an improvement to functionality under these conditions
Journal name Physical Review A   Check publisher's open access policy
ISSN 1050-2947
Publication date 2003
Sub-type Article (original research)
DOI 10.1103/PhysRevA.68.022313
Open Access Status File (Publisher version)
Volume 68
Issue 2
Start page 022313-1
End page 022313-16
Total pages 16
Editor B. Craseman
L. A. Collins
et al.
Place of publication USA
Publisher The American Physical Society
Collection year 2003
Language eng
Subject C1
240201 Theoretical Physics
780102 Physical sciences
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 , 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.
Keyword Optics
Physics, Atomic, Molecular & Chemical
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 02:11:42 EST