  We report on the creation of an array of spin-squeezed ensembles of cesium
atoms via Rydberg dressing, a technique that offers optical control over local
interactions between neutral atoms. We optimize the coherence of the
interactions by a stroboscopic dressing sequence that suppresses
super-Poissonian loss. We thereby prepare squeezed states of $N=200$ atoms with
a metrological squeezing parameter $\xi^2 = 0.77(9)$ quantifying the reduction
in phase variance below the standard quantum limit. We realize metrological
gain across three spatially separated ensembles in parallel, with the strength
of squeezing controlled by the local intensity of the dressing light. Our
method can be applied to enhance the precision of tests of fundamental physics
based on arrays of atomic clocks and to enable quantum-enhanced imaging of
electromagnetic fields.
