  Multifragmentation in Au+Au collisions is investigated at incident energies
in the range 100-400 MeV per nucleon by means of a recently developed quantal
Langevin model. The inclusion of quantum fluctuations enhances the average
multiplicity of intermediate mass fragments, especially in central collisions.
This is mainly because the excitation energies of fragments are reduced due to
the quantal behavior of intrinsic specific heat.
