  We study superdense coding with uniformly accelerated particle in single mode
approximation and beyond single mode approximation. We use four different
functions, the capacity of superdense coding, negativity, discord and the
probability of success for evaluating the final results. In single mode
approximation, all the four functions behave as expected, however in beyond
single mode approximation, except the probability of success, the other three
functions represent peculiar behaviors at least for special ranges where the
beyond single mode approximation is strong.
