Controlling photons by phonons via giant atom in a waveguide QED setup

We investigate the single photon scattering in a phonon -photon hybrid system in the waveguide quantum electrody-namics (QED) scheme. In our consideration, an artificial giant atom, which is dressed by the phonons in a sur-face acoustic wave resonator, interacts with a coupled resonator waveguide (CRW) nonlocally via two connecting sites. Together with the interference effect by the nonlocal coupling, the phonon serves as a controller to the trans-port of the photon in the waveguide. On the one hand, the coupling strength between the giant atom and the surface acoustic wave resonator modulates the width of the trans-mission valley or window in the near resonant regime. On the other hand, the two reflective peaks induced by the Rabi splitting degrade into a single one when the giant atom is large detuned from the surface acoustic resonator, which implies an effective dispersive coupling. Our study paves the way for the potential application of giant atoms in the hybrid system. & COPY; 2023 Optica Publishing Group

Automated summary

We investigate the scattering of a single photon in a phonon-photon hybrid system in the waveguide quantum electrodynamics (QED) scheme. An artificial giant atom dressed by phonons in a surface acoustic wave resonator interacts with a coupled resonator waveguide (CRW) nonlocally via two connecting sites. The phonon, along with the interference effect by nonlocal coupling, acts as a controller for photon transport in the waveguide. The study explores the modulation of transmission valley or window width in the near resonant regime and the effective dispersive coupling in the presence of a large detuned giant atom and a surface acoustic resonator.