  Excitation energy transfer is crucially involved in a variety of systems.
During the process, the non-Condon vibronic coupling and the surrounding
solvent interaction may synergetically play important roles. In this work, we
study the correlated vibration-solvent influences on the non-Condon exciton
spectroscopy. Statistical analysis is elaborated for the overall
vibration-plus-solvent environmental effects. Analytic solutions are derived
for the linear absorption of monomer systems. General simulations are
accurately carried out via the dissipaton-equation-of-motion approach. The
resulted spectra in either the linear absorption or strong field regime clearly
demonstrate the coherence enhancement due to the synergetic vibration-solvent
correlation.
