We propose a scheme for teleporting an unknown atomic state via adiabatic passage. Taking advantage of adiabatic passage, the atom has no probability of being excited and thus the atomic spontaneous emission is suppressed. We also show that the fidelity can reach 1 under certain condition.
Based on adiabatic passage,transfers of an unknown state of one atom,entangled state of two-atom and GHZ state are realized,where only one vacuum-cavity is needed.In these schemes,since the quantum information is encoded in atomic ground states,the system evolves in the dark state space,and there is no population in the atomic excited state,atomic spontaneous emission is suppressed effectively.Compared with previous proposals,the schemes need less resource and easier operation.In addition,the feasibility for experiment is discussed.