Interaction and entanglement engineering in a driven-giant-atom setup with a coupled resonator waveguide

We investigate the coherent interactions mediated by the coupled resonator waveguide between two types of giant atoms. We find that the effective coupling and collective dissipation can be controlled on demand by adjusting the configuration of the giant atoms. As a result, the external driving gives birth to a substantial steady-state entanglement between two giant atoms, which exhibits a Rabi splitting character. In the three-giant-atom setup, we find that the nonzero next neighbor atomic entanglement can surpass the neighbor ones and is able to be adjusted by tuning the driving phase, which serves as an artificial magnetic field. The enhancement of next neighbor atomic entanglement cannot be realized in the small-atom setup. We hope these controllable interactions in giant-atom arrays are useful applications in the quantum information process.