Biophotons and nonclassical light

A model has been presented for the description of biophoton activity, which is based on the quantum theory of the interaction of a photon field with a phonon reservoir. The model is used to analyse the dynamics of the nonclassical effects induced by the Schrodinger-cat-state, especially involving aspects of the entropies of light field. A new quantity, so-called photon statistical entropy, is predicted to be able to characterise coherence properties of biophotons, which can be obtained by means of measurement of spontaneous emission. Experiments on a leaf are then performed and compared with a non-living radiator; the biophotons are found to have significantly higher coherence than ordinary light, As an application, biophoton emission of soybean samples with and without genetic treatment is investigated in terms of the photon statistical entropy concept.