You can find the online document here.
Publication appeared in Quantum Information and Computation for Chemistry: Advances in Chemical Physics
Future experiments using more entangled photon pairs may allow the study of ground-state properties of molecular ground states, such as the delocalized bonds in benzene.
Reference is taken from A. Aspuru-Guzik and P. Walther, Nat. Phys. 8, 285–291 (2012)