The overtaking collision between electron acoustic multisolitons in an unmagnetized
quantum plasma consisting of ions, and both hot and cold electrons has been
investigated. The Hirota bilinear method is employed to study phase shifts and
trajectories during the overtaking collision of multisolitons. It is observed
that phase shifts are significantly affected by the quantum parameter $H$. The
phase shifts are proportional to $B^{1/3}$ (dispersion coefficient) and are
functions of their respective amplitudes. It is also seen that the soliton structure
occurs only if $H$ less than 2.
