  With rotating-wave approximation (RWA), we show in this paper that exciton
transmission in a one-dimensional two-level molecule chain embedded in a cavity
can be enhanced or suppressed by strong cavity-chain couplings. This exciton
transmission is closely related to the number of molecules and the distribution
of molecular exciton energy. In addition, we propose a proposal to enhance the
exciton transmission by quantum-jump-based feedback. These results may find
applications in experiments of exciton transmission in organic materials.
