  In this article, the processes of energy absorption and coherent transfer in
a dimer is studied. The dimer includes two two-level pigments --- donor and
acceptor, where donor is assumed being excited by a control pulse in the time
domain. We investigate the dynamics of probability that the acceptor is in the
excited state and the total efficiency of energy absorption and transfer under
different temporal shape of control pulse. Quantum concurrence of the dimer is
also discussed.
