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Related Experiment Video

Updated: Jan 19, 2026

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Seconds-scale coherence on an optical clock transition in a tweezer array.

Matthew A Norcia1, Aaron W Young1, William J Eckner1

  • 1JILA, University of Colorado and National Institute of Standards and Technology, and Department of Physics, University of Colorado, Boulder, CO 80309, USA.

Science (New York, N.Y.)
|September 14, 2019
PubMed
Summary

This study introduces optical tweezer arrays for precise atomic clock measurements. These arrays combine the benefits of single ions and neutral atom ensembles, achieving high coherence and stability for advanced metrology.

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Area of Science:

  • Atomic physics
  • Quantum metrology
  • Optical atomic clocks

Background:

  • Coherent control of optical transitions is crucial for precision frequency metrology.
  • Optical atomic clocks use single ions or neutral atom ensembles to stabilize laser frequencies.
  • Existing methods have limitations in combining precision and scalability.

Purpose of the Study:

  • To demonstrate a novel platform combining strengths of single-ion and neutral-atom approaches.
  • To utilize optical tweezer arrays for coherent control of strontium atoms.
  • To evaluate the performance of this platform for metrology applications.

Main Methods:

  • Arrays of individual strontium atoms confined in optical tweezers.
  • Interrogation of optical transitions within these atomic arrays.
  • Repeated interrogation to achieve high duty cycles.

Main Results:

  • Achieved coherence times of 3.4 seconds.
  • Demonstrated single-ensemble duty cycles up to 96%.
  • Reported frequency stability of 4.7 × 10-16 (τ/s)-1/2.

Conclusions:

  • Optical tweezer arrays offer a powerful new tool for coherent control.
  • This platform shows significant promise for precision metrology.
  • The approach is also applicable to quantum information science.