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

doi:10.1103/PhysRevLett.95.210504

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

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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 language	English
Article number	210504
Journal	Physical Review Letters
Volume	95
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.95.210504
Publication status	Published - 18 Nov 2005
Externally published	Yes

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AU - Resch, K. J.

AU - Gilchrist, A.

AU - O'Brien, J. L.

AU - Pryde, G. J.

AU - White, A. G.

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

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