Realization of Strong Coupling between Deterministic Single-Atom Arrays and a High-Finesse Miniature Optical Cavity

We experimentally demonstrate strong coupling between a one-dimensional (1D) single-atom array and a high-finesse miniature cavity. The atom array is obtained by loading single atoms into a 1D optical tweezer array with dimensions of 1 x 11. Therefore, a deterministic number of atoms is obtained, and the atom number is determined by imaging the atom array on a CCD camera in real time. By precisely controlling the position and spacing of the atom array in the high finesse Fabry-Perot cavity, all the atoms in the array are strongly coupled to the cavity simultaneously. The vacuum Rabi splitting spectra are discriminated for deterministic atom numbers from 1 to 8, and the p dependence of the collective ffiffiffiN enhancement of the coupling strength on atom number N is validated at the single-atom level.

Automated summary

We demonstrate strong coupling between a one-dimensional single-atom array and a high-finesse miniature cavity experimentally. By loading single atoms into a one-dimensional optical tweezer array, a deterministic number of atoms is obtained and the atom number is determined through real-time imaging. By precisely controlling the position and spacing of the atom array, all atoms in the array are strongly coupled to the cavity simultaneously. The vacuum Rabi splitting spectra are observed for deterministic atom numbers from 1 to 8, validating the dependence of the collective ffiffiffiN enhancement of coupling strength on atom number N at the single-atom level.