Demonstration of a Simple Entangling Optical Gate and Its Use in Bell-State Analysis

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Author(s)
Langford, NK
Weinhold, TJ
Prevedel, R
Resch, KJ
Gilchrist, A
O'Brien, JL
Pryde, GJ
White, AG
Year published
2005
Metadata
Show full item recordAbstract
We demonstrate a new architecture for an optical entangling gate that is significantly simpler than previous realizations, using partially polarizing beam splitters so that only a single optical mode-matching condition is required. We demonstrate operation of a controlled-Z gate in both continuous-wave and pulsed regimes of operation, fully characterizing it in each case using quantum process tomography. We also demonstrate a fully resolving, nondeterministic optical Bell-state analyzer based on this controlled-Z gate. This new architecture is ideally suited to guided optics implementations of optical gates.We demonstrate a new architecture for an optical entangling gate that is significantly simpler than previous realizations, using partially polarizing beam splitters so that only a single optical mode-matching condition is required. We demonstrate operation of a controlled-Z gate in both continuous-wave and pulsed regimes of operation, fully characterizing it in each case using quantum process tomography. We also demonstrate a fully resolving, nondeterministic optical Bell-state analyzer based on this controlled-Z gate. This new architecture is ideally suited to guided optics implementations of optical gates.
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Journal Title
Physical Review Letters
Volume
95
Issue
21
Publisher URI
Copyright Statement
© 2005 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 link for access to the definitive, published version.
Subject
Mathematical sciences
Physical sciences
Engineering