Continuously operating cavity-enhanced neutral atom array of 1200 171Yb atoms

Measurement-based quantum error correction requires fault-tolerant logical qubits to be encoded in typically tens to thousands of physical qubits. Neutral atoms, which can be confined at short distances with optical potentials, offer a path to building these large systems. Since neutral atoms have finite lifetimes in optical traps, however, the ability to detect and correct atom loss will be essential for practical systems. In this work, we demonstrate the assembly and continuous operation of a system of neutral $^{171}Yb$ atoms confined in a cavity-enhanced optical lattice potential at 784~nm, a magic wavelength for the $^{1}S_0$ - $^{3}P_1$ transition. A spatially separated MOT and moving optical lattice are used to load the atom array, while spatially selective light shifts allow for mid-circuit measurement and deterministic reloading of lost atoms.