Probing biological light-harvesting phenomena by optical cavities
  We propose a driven optical cavity quantum electrodynamics (QED) set up aimed at directly probing energy transport dynamics in photosynthetic biomolecules. We show that detailed information concerning energy transfer paths and delocalization of exciton states can be inferred (and exciton energies estimated) from the statistical properties of the emitted photons. This approach provides us with a novel spectroscopic tool for the interrogation of biological systems in terms of quantum optical phenomena which have been usually studied for atomic or solid-state systems, e.g. trapped atoms and semiconductor quantum dots. 
Filippo Caruso, Semion K. Saikin, Enrique Solano, Susana F. Huelga,   Al\'an Aspuru-Guzik, Martin B. Plenio
physics.bio-ph cond-mat.soft physics.optics q-bio.BM quant-ph