Manipulation of two-photon fluorescence spectra of chromophore   aggregates with entangled photons: A simulation study
  The non-classical spectral and temporal features of entangled photons offer new possibilities to investigate the interactions of excitons in photosynthetic complexes, and to target the excitation of specific states. Simulations of fluorescence in the bacterial reaction center induced by entangled light demonstrate a selectivity of double-exciton states which is not possible using classical stochastic light with the same power spectrum. 
Frank Schlawin, Konstantin Dorfman, Benjamin P. Fingerhut and Shaul   Mukamel
quant-ph physics.chem-ph physics.optics