Degenerate Rabi spectroscopy of the Floquet engineered optical lattice clock

TL;DR

This paper demonstrates that periodic shaking of an Sr-87 optical lattice clock preserves SU(N) symmetry during Floquet engineering, enabling richer quantum simulations without symmetry breaking.

Contribution

It provides experimental evidence that Floquet driving maintains SU(N) symmetry in optical lattice clocks, expanding possibilities for quantum simulation.

Findings

Atoms at different Zeeman sublevels are driven uniformly.

The distribution among sublevels remains unchanged under periodic shaking.

Floquet engineering can tailor SU(N) physics without symmetry breaking.

Abstract

Simulating physics with large SU(N) symmetry is one of the unique advantages of Alkaline-earth atoms.Introducing periodical driving modes to the system may provide more rich SU(N) physics that static one could not reach. However, whether the driving modes will break the SU(N) symmetry is still lack of discussions. Here we experimentally study a Floquet engineered degenerate Sr-87 optical lattice clock (OLC) by periodically shaking the lattice. With the help of Rabi spectroscopy, we find that the atoms at different Zeeman sublevels are tuned by the same driven function. Meanwhile, our experimental results suggest that uniform distribution among the sublevels will not change despite the driving. Our experimental demonstrations may pave the way to implementation of FE on tailoring the SU(N) physics in OLC system.