Physics – Quantum Physics
Scientific paper
2007-10-17
Phys. Rev. B 77, 195110 (2008)
Physics
Quantum Physics
Scientific paper
10.1103/PhysRevB.77.195110
A thulium-doped crystal is experimentally shown to be an excellent candidate for broadband quantum storage in a solid-state medium. For the first time, nuclear spin coherence is optically excited, detected and characterized in such a crystal. The lifetime of the spin coherence -- the potential storage entity -- is measured by means of Raman echo to be about 300 $\mu$s over a wide range of ground state splittings. This flexibility, attractive for broadband operation, and well fitted to existing quantum sources, results from the simple hyperfine structure, contrasting with Pr- and Eu- doped crystals.
Bretenaker Fabien
Chanelière Thierry
Du Yann Le
Goldfarb Fabienne
Goldner Philippe
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