Floquet engineering tunes ultracold molecule interactions and produces two-axis twisting dynamics

Phys.org  September 12, 2024 Polar molecules confined in an optical lattice are a versatile platform to explore spin-motion dynamics based on strong, long-range dipolar interactions. A team of researchers in the US (University of Colorado, Harvard University, industry) used Floquet engineering to realize new quantum many-body systems of polar molecules. Using a spin encoded in the two lowest rotational states of ultracold 40K87Rb molecules, they mutually validated XXZ spin models tuned by a Floquet microwave pulse sequence against those tuned by a d.c. electric field. This validation sets the stage for the realization of Hamiltonians inaccessible with static fields. They […]