  We propose an approach to simultaneously excite two atoms by using
cavity-assisted Raman process in combination with cavity photon-mediated
interaction. The system consists of a two-level atom and a $\Lambda$-type or
V-type three-level atom, which are coupled together with a cavity mode. Having
derived the effective Hamiltonian, we find that under certain circumstances a
single photon can simultaneously excite two atoms. In addition, multiple
photons and even a classical field can also simultaneously excite two atoms. As
an example, we show a scheme to realize our proposal in a circuit QED setup,
which is artificial atoms coupled with a cavity. The dynamics and the quantum
statistical properties of the process are investigated with experimentally
feasible parameters.
