  Conical intersections are degeneracies between electronic states and are very
common in nature. It has been found that they can also be created both by
standing or by running laser waves. The latter are called light-induced conical
intersections. It is well known that conical intersections are the sources for
numerous topological effects which are manifested e.g. in the appearance of the
geometric or Berry phase. In one of our former works by incorporating the
diabatic-to-adiabatic transformation angle with the line-integral technique we
have calculated the Berry-phase of the light-induced conical intersections.
  Here we demonstrate that by using the time dependent adiabatic approach
suggested by Berry the geometric phase of the light-induced conical
intersections can also be obtained and the results are very similar to those of
the time-independent calculations.
