Electron-correlation dynamics of a one-dimensional H2 model in a quantized photon field

We investigate the dynamics of the degree of electron correlation for a one-dimensional H2 model in the presence of a one-mode coherent field with a small average photon number. The degree of electron correlation is examined through the information entropy. It is found that the interaction with such a quantized photon field presents an unusual case where by only the degree of electron correlation changes with a constant charge density distribution.