Spin squeezing in an array of atomic ensembles via Rydberg Dressing

Advancing the performance of quantum sensors towards fundamental limits requires control of interactions to engineer entanglement. Numerous quantum sensing platforms, from multiplexed atomic clocks to solid-state magnetometers, natively support local interactions. Yet realizing metrological gain through local interactions has, until recently, remained intractable. Rydberg dressing enables strong, optically controllable and short-ranged interactions between ground state neutral atoms, thereby providing a promising approach to local control of entanglement in multiplexed clocks and sensors. However, maintaining the coherence of the dynamics in large and dense Rydberg-dressed atomic systems has proved challenging due to collective loss. In this work, we utilize a single-photon excitation scheme to dress the hyperfine clock states of cesium in an array of cold atomic ensembles. We leverage a stroboscopic approach to Rydberg dressing to suppress loss and preserve coherence out to long interaction times. We apply these coherent interactions to prepare multiple independent squeezed spin states, reaching a metrological squeezing parameter of 0.77(9) [1]. Finally, we discuss progress towards applying coherent Rydberg dressing to a single-atom tweezer array, with applications in quantum simulation of driven spin systems and optimal control of entanglement.