Multi-ensemble metrology by programming local rotations with atom movements

Adam L. Shaw, Ran Finkelstein, Richard Bing Shiun Tsai, Pascal Scholl, Tai Hyun Yoon, Joonhee Choi, Manuel Endres

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


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 atoms trapped in tweezers. The scheme is highly robust as it relies only on the relative position changes of tweezers and requires no additional addressing beams. Using this technique, we implement single-shot, dual-quadrature readout of Ramsey interferometry using two atomic ensembles simultaneously, and show an enhancement of the usable interrogation time at a given phase-slip error probability. Finally, we program a sequence that performs local dynamical decoupling during Ramsey evolution to evolve three ensembles with variable phase sensitivities, a key ingredient of optimal clock interrogation. Our results demonstrate the potential of fully programmable quantum optical clocks even without entanglement and could be combined with metrologically useful entangled states in the future.

Original languageEnglish
Pages (from-to)195-201
Number of pages7
JournalNature Physics
Issue number2
Publication statusPublished - 2024 Feb

Bibliographical note

Publisher Copyright:
© The Author(s) 2024.

ASJC Scopus subject areas

  • General Physics and Astronomy


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