Landau parameter, giant monopole and quadrupole states in the relativistic Hartree approximation

By using the Hartree approximation which includes vacuum fluctuation correction in a model relativistic quantum field theory, it is found that the relativistic Landau parameters and the compressibility of the Fermi-liquid in the nuclear system, and the excitation energies of the giant monopole and quadrupole states are more close to the experimental values in comparison with the results of the mean-field theory