Exchange Properties of the Information Entropy between Field and Atom

We explore the phenomena of entropy exchange between field and atom. Our work shows that the substantial entropy exchange is dependent strongly on the choices of the initial state of both the field and atom, and independent of the parameters of the non-linear medium, the intensity of non-linear coupling and detuning. We find that the substantial entropy exchange can occur when the mixed state parameters of the atom and the average number of photons in the cavity are respectively bounded in the regions:0<;Pe<;0.5 and 0<;n̅<;6.