Measurement and control of the interaction frequency shift in bosonic optical lattice clocks

Abstract:We report precise measurements of inter-level interactions in a bosonic optical lattice clock based on $^{88}$Sr atoms. We observe a nonlinear density dependence of the clock shift, even without reaching quantum degeneracy. In a 2D lattice, the Rabi line shape exhibits an interaction sideband consistent with a collective spin model, while in a 1D lattice the shift is modified by density-induced dephasing. These findings, combined with a careful choice of interrogation detuning and atomic density, can enable operation at a net-zero systematic density shift in $^{88}$Sr lattice clocks. We discuss the implications of these findings in many-body physics, quantum simulation, and precision isotope shift measurements, which provide a powerful probe for new physics beyond the Standard Model.

Atomic Physics (physics.atom-ph); Quantum Physics (quant-ph)

arXiv:2608.02425 [physics.atom-ph]

(or arXiv:2608.02425v1 [physics.atom-ph] for this version)

https://doi.org/10.48550/arXiv.2608.02425 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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