Multi-ensemble metrology by programming local rotations with atom movements

Understand

Current optical atomic clocks do not utilize their resources optimally.

• In particular, an exponential gain in sensitivity could be achieved if multiple atomic ensembles were to be controlled or read-out individually, even without entanglement.
• However, controlling optical transitions locally remains an outstanding challenge for neutral atom based clocks and quantum computing platforms.
• Here we show arbitrary, single-site addressing for an optical transition via sub-wavelength controlled moves of tweezer-trapped atoms, which we perform with $99.84(5)\%$ fidelity and with $0.1(2)\%$ crosstalk to non-addressed atoms.