  Spin-chain models have been widely studied in terms of quantum information
processes, for instance for the faithful transmission of quantum states. Here,
we investigate the limitations of mapping this process to an equivalent one
through a bosonic chain. In particular, we keep in mind experimental
implementations, which the progress in integrated waveguide circuits could make
possible in the very near future. We consider the feasibility of exploiting the
higher dimensionality of the Hilbert space of the chain elements for the
transmission of a larger amount of information, and the effects of unwanted
excitations during the process. Finally, we exploit the information-flux method
to provide bounds to the transfer fidelity.
