  Quantum computation often suffers from artificial symmetry breaking. We
should strive to suppress the artifact both by theoretical and technological
improvements. The theoretical formalism of the lattice fermion with exact
chiral symmetry is called the chiral fermion. In this presentation, we show how
the chiral fermion describes chiral physics in quantum computing. We also show
that, although a drawback of the chiral fermion is large computational cost,
there is a loophole in one dimension.
