Lattice Light Shift Evaluations in a Dual-Ensemble Yb Optical Lattice Clock

Area of Science:

• Atomic, Molecular, and Optical Physics
• Metrology and Precision Measurement

Background:

• State-of-the-art optical lattice clocks rely on magic wavelength trapping.
• Beyond-electric-dipole polarizability terms can disrupt magic wavelength trapping, impacting clock precision.
• Discrepancies exist between experimental and theoretical calculations of the atomic multipolarizability term.

Purpose of the Study:

• To develop a novel approach for evaluating lattice light shifts.
• To address discrepancies in atomic multipolarizability calculations.
• To establish a new technique for probing atomic multipolarizability and hyperpolarizability coefficients.

Main Methods:

• Combined imaging and multi-ensemble techniques to evaluate lattice light shift atomic coefficients.
• Utilized comparisons in a dual-ensemble lattice clock to rapidly assess differential frequency shifts.
• Applied a running wave field to probe multipolarizability and hyperpolarizability coefficients.

Main Results:

• Successfully evaluated lattice light shift atomic coefficients.
• Demonstrated rapid evaluation of differential frequency shifts using a dual-ensemble lattice clock.
• Established a new technique for probing atomic multipolarizability and hyperpolarizability.

Conclusions:

• The novel approach effectively evaluates lattice light shifts, addressing experimental and theoretical discrepancies.
• The developed technique offers a path towards more accurate atomic clocks.
• Future evaluations of lattice light shifts can benefit from this new methodology.