  In superconducting quantum circuits (SQCs), chiral routing quantum
information is often realized with the ferrite circulators, which are usually
bulky, lossy and require strong magnetic fields. To overcome those problems, we
propose a novel method to realize chiral quantum networks by exploiting giant
atom effects in SQC platforms. By assuming each coupling point being modulated
with time, the interaction becomes momentum-dependent, and giant atoms will
chirally emit photons due to interference effects. The chiral factor can
approach 1, and both the emission direction and rate can be freely tuned by the
modulating signals. We demonstrate that a high-fidelity state transfer between
remote giant atoms can be realized. Our proposal can be integrated on the
superconducting chip easily, and has the potential to work as a tunable toolbox
for quantum information processing in future chiral quantum networks.
