  In this article, we investigate the communication channel of fermionic system
in an accelerated frame. We observe that at the infinite acceleration, the
mutual information of single rail quantum channel coincides with that of double
rail quantum channel, but those of classical ones reach different values.
Furthermore, we find that at the infinite acceleration, the conditional entropy
of single(or double) rail quantum channel vanishes, but those of classical ones
may have finite values. In addition, we see that even when considering a method
beyond the single mode approximation, the dual rail entangled state seems to
provide better channel capacity than the single rail entangled state, unlike
the bosonic case. Moreover, we find that the single-mode approximation is not
sufficient to analyze the communication channel of fermionic system in an
accelerated frame.
