Experimental implementation of the optimal linear-optical controlled phase gate

Details Experimental implementation of the optimal linear-optical controlled phase gate Experimental implementation of the optimal linear-optical controlled phase gate

2010-07-27

arxiv.org/abs/1007.4797v1

Phys. Rev. Lett. 106, 013602 (2011)

Physics

Quantum Physics

4 pages, 5 figures, 1 table

Scientific paper

We report on the first experimental realization of optimal linear-optical controlled phase gates for arbitrary phases. The realized scheme is entirely flexible in that the phase shift can be tuned to any given value. All such controlled phase gates are optimal in the sense that they operate at the maximum possible success probabilities that are achievable within the framework of any postselected linear-optical implementation. The quantum gate is implemented using bulk optical elements and polarization encoding of qubit states. We have experimentally explored the remarkable observation that the optimum success probability is not monotone in the phase.

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