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arXiv · 1502.04261

Photon Sorting, Efficient Bell Measurements and a Deterministic CZ Gate using a Passive Two-level Nonlinearity

T. C. Ralph·I. Söllner·S. Mahmoodian·A. G. White·P. Lodahl
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Abstract

Although the strengths of optical non-linearities available experimentally have been rapidly increasing in recent years, significant challenges remain to using such non-linearities to produce useful quantum devices such as efficient optical Bell state analysers or universal quantum optical gates. Here we describe a new approach that avoids the current limitations by combining strong non-linearities with active Gaussian operations in efficient protocols for Bell state analysers and Controlled-Sign gates.

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T. C. Ralph, I. Söllner, S. Mahmoodian, A. G. White, P. Lodahl. 2015-02-15. Photon Sorting, Efficient Bell Measurements and a Deterministic CZ Gate using a Passive Two-level Nonlinearity. https://doi.org/10.1103/physrevlett.114.173603

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