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

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

2005-06-30

arxiv.org/abs/quant-ph/0506262v2

Phys.Rev.Lett.95:210504,2005

Physics

Quantum Physics

4 pages, 3 figures. v2: additional author, improved data and figures (low res), some other minor changes. Accepted for publica

Scientific paper

10.1103/PhysRevLett.95.210504

We demonstrate a new architecture for an optical entangling gate that is significantly simpler than previous realisations, using partially-polarising beamsplitters 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 characterising it in each case using quantum process tomography. We also demonstrate a fully-resolving, nondeterministic optical Bell-state analyser based on this controlled-Z gate. This new architecture is ideally suited to guided optics implementations of optical gates.

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