  We investigate the dynamics of giant atom(s) in a waveguide QED scenario,
where the atom couples to the coupled resonator waveguide via two sites. For a
single giant atom setup, we find that the atomic dissipation rate can be adjust
by tuning its size. For the two giant atoms system, the waveguide will induce
the controllable individual and collective dissipation as well as effective
inter-atom coupling. As a result, we can theoretically realize the robust
entangled state preparation and non-reciprocal excitation trapping. We hope our
study can be applied in quantum information processing based on photonic and
acoustic waveguide setup.
