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Proceedings Paper

Analysis of errors in an optical controlled-NOT gate
Author(s): Tomohisa Nagata; Ryo Okamoto; Keiji Sasaki; Shigeki Takeuchi
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Paper Abstract

The errors in linear optics controlled not (C-NOT) gates are analyzed considering the polarization-dependent phase sifts, in addition to the incorrectness of the beam splitting ratios. It is shown that the phase sifts at the optical components is as crucial as other error sources discussed in the previous studies. Such a phase shift unintentionally changes the linearly-polarized photons into a elliptically polarized ones. The operators for a beam splitting device and the process matrix of the C-NOT operation including such errors are also given.

Paper Details

Date Published: 26 August 2009
PDF: 7 pages
Proc. SPIE 7465, Quantum Communications and Quantum Imaging VII, 746513 (26 August 2009); doi: 10.1117/12.829607
Show Author Affiliations
Tomohisa Nagata, Hokkaido Univ. (Japan)
Osaka Univ. (Japan)
Ryo Okamoto, Hokkaido Univ. (Japan)
Osaka Univ. (Japan)
Keiji Sasaki, Hokkaido Univ. (Japan)
Shigeki Takeuchi, Hokkaido Univ. (Japan)
Osaka Univ. (Japan)


Published in SPIE Proceedings Vol. 7465:
Quantum Communications and Quantum Imaging VII
Ronald E. Meyers; Yanhua Shih; Keith S. Deacon, Editor(s)

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