Ultrafast Local State Detection of Single Atoms and Deterministic Loading of Tweezer Array Using Cavity Readout

We investigate an atomic array coupled to a high-finesse optical cavity. This system is a versatile platform for exploring open many-body quantum dynamics, implementing quantum error correction, and testing quantum advantage.

Our experiment demonstrates superresolution microscopy of cavity standing wave patterns by probing the AC stark shift of single tweezed atoms, with which we characterize our cavity and tweezer array for the following projects:

For single atoms in the cavity mode, We realize an ultrafast and highly localized state detection with fluorescence or transmission methods. A fidelity above 99% in distinguishing F=1, F=2, and no atom states can be achieved in 40 microseconds without perturbing the quantum states of outside atoms.

We also report our progress towards the deterministic loading of an atomic array with cavity detection. A long-range correlation between atoms in the array can be demonstrated by superradiance photon scattering from or into the cavity mode.