Tunable spatial decoherers for polarization-entangled photons.
We report a novel controllable source of spatial decoherence for twin photons, based upon commercially available wedge depolarizers. This allows us to convert the polarization-entangled singlet state into a tunable mixed state. A full characterization of this mixed state, by means of quantum tomography, shows that such a spatial decoherer can be used for synthesizing Werner-like states on demand.
Puentes
Graciana
G
Huygens Laboratory, Leiden University, Leiden, The Netherlands. graciana@molphys.leidenuniv.nl
Voigt
Dirk
D
Aiello
Andrea
A
Woerdman
J P
JP