Two-mode squeezing in Floquet-engineered power-law interacting spin models

Long-range interacting spin systems can be used to generate metrologically useful entanglement in the form of spin squeezing resulting in quantum enhanced sensitivity. This work considers power-law spin exchange interactions to generate two-mode squeezing in a bilayer geometry. It shows how spatial control over the geometry allows for achieving the same sensitivity with power-law interactions as with infinite-range interactions, and how spatially Floquet-engineered interactions allow for achieving the ultimate Heisenberg scaling of sensitivity.