We investigate the dynamics of a giant atom (or atoms) 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 adjusted by tuning its size. For the two-giant-atom system, the waveguide will induce the controllable individual and collective dissipation as well as effective interatom coupling. As a result, we can realize theoretically the robust entangled state preparation and nonreciprocal excitation evolution. We hope our study can be applied in quantum information processing based on a photonic and acoustic waveguide setup.

中文翻译：

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通过可控耗散和耦合在巨原子中制备纠缠和非互易激发演化

我们研究了波导 QED 场景中一个（或多个）巨原子的动力学，其中原子通过两个位置耦合到耦合谐振器波导。对于单巨原子设置，我们发现可以通过调整其大小来调整原子耗散率。对于双巨原子系统，波导将引起可控的个体和集体耗散以及有效的原子间耦合。因此，我们可以在理论上实现稳健的纠缠态准备和非互易激发演化。我们希望我们的研究可以应用于基于光子和声波波导设置的量子信息处理。