Microwave dressing of 87Rb Rydberg atoms strengthens effective interactions, lowering the photon-correlation g(2)(0) and increasing the blockade radius in an ensemble single-photon source.
Transverse-Field Ising Dynamics in a Rydberg-Dressed Atomic Gas
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abstract
We report on the realization of long-range Ising interactions in a cold gas of cesium atoms by Rydberg dressing. The interactions are enhanced by coupling to Rydberg states in the vicinity of a F\"{o}rster resonance. We characterize the interactions by measuring the mean-field shift of the clock transition via Ramsey spectroscopy, observing one-axis twisting dynamics. We furthermore emulate a transverse-field Ising model by periodic application of a microwave field and detect dynamical signatures of the paramagnetic-ferromagnetic phase transition. Our results highlight the power of optical addressing for achieving local and dynamical control of interactions, enabling prospects ranging from investigating Floquet quantum criticality to producing tunable-range spin squeezing.
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Enhancement of Rydberg Blockade via Microwave Dressing
Microwave dressing of 87Rb Rydberg atoms strengthens effective interactions, lowering the photon-correlation g(2)(0) and increasing the blockade radius in an ensemble single-photon source.