Demonstration of a simple entangling optical gate and its use in bell-state analysis

N. K. Langford*, T. J. Weinhold, R. Prevedel, K. J. Resch, A. Gilchrist, J. L. O'Brien, G. J. Pryde, A. G. White

*Corresponding author for this work

Research output: Contribution to journalArticle

188 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number210504
Pages (from-to)1-4
Number of pages4
JournalPhysical Review Letters
Volume95
Issue number21
DOIs
Publication statusPublished - 18 Nov 2005
Externally publishedYes

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