22 February 2018 Generating non-classical correlations between photons and spins in a crystal
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Abstract
We perform the experimental generation of pairs of photons on a solid-state rare-earth ion doped crystal of Eu3+:Y2SiO5, by using a DLCZ-like protocol designed for inhomogeneously broadened media. The idea relies on the use of the atomic frequency comb technique, in order to rephase the atoms for the emission of the photons. A specificity of this protocol is its high temporal multimode capacity, as many pairs of photons can be emitted at different instants in time. A Cauchy-Schwarz inequality violation of 2.88>1 is witnessed, proving the non-classical correlations of the photon pairs that we produce. A detailed analysis of the source and detection imperfections is conducted, revealing ways of increasing the quality of the pairs that are produced.
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Jean Etesse, Jean Etesse, Cyril Laplane, Cyril Laplane, Pierre Jobez, Pierre Jobez, Nicolas Gisin, Nicolas Gisin, Mikael Afzelius, Mikael Afzelius, "Generating non-classical correlations between photons and spins in a crystal", Proc. SPIE 10547, Advances in Photonics of Quantum Computing, Memory, and Communication XI, 105470U (22 February 2018); doi: 10.1117/12.2300061; https://doi.org/10.1117/12.2300061
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