  We propose a linear optical scheme for the teleportation of unknown ionic
states, the entanglement concentration for nonmaximally entangled states for
ions via entanglement swapping and the remote preparation for ionic entangled
states. The unique advantage of the scheme is that the joint Bell-state
measurement needed in the previous schemes is not needed in the current scheme,
i.e. the joint Bell-state measurement has been converted into the product of
separate measurements on single ions and photons. In addition, the current
scheme can realize the quantum information processes for ions by using linear
optical elements, which simplify the implementation of quantum information
processing for ions.
