A Ytterbium-171 atom array in an optical cavity*

Alkaline earth(-like) atom arrays are an emerging platform for a wide range of quantum science applications, leveraging their unique properties, including ultra-narrow optical "clock" transitions and isolated nuclear spins. Integrating a 171-Yb atom array —an alkaline earth-like species— with an optical cavity unlocks exciting possibilities, enhancing quantum measurements for networking and feedback-enhanced circuits while enabling long-range interactions crucial for large-scale entanglement in metrology and simulation.
We will present our progress toward 171Yb atom array coupling to our dual-wavelength (556 nm/1389 nm) Fabry-Perot cavity in the near concentric regime. We report a high finesse value with cavity stability ∣𝑔_cav| > 0.9, correspond to a single-atom cooperativity 𝐶 > 5.7 at 556 nm. With our cavity-chamber integration complete and a 3DMOT inside the cavity, we are now advancing toward atom trapping. We predict a high qubit readout fidelity within tens of microseconds for fast quantum non-demolition (QND) readout , and a collection efficiency of ~50% for telecom photons.