Delayed luminescence of biological systems in terms of coherent states

Delayed luminescence is the long-term “ultraweak” afterglow of biological systems after exposure to light illumination, it displays hyperbolic-like relaxation with sometimes remarkable hyperbolic oscillations around the decay function. We demonstrate that the hyperbolic relaxation of biological systems is a characteristic active response of an ergodic coherent state, while the hyperbolic-like oscillations are consequences of the coupling of coherent states with a necessary difference in the characteristic damping frequencies.