Fast spin squeezing by distance-selective long-range interactions with Rydberg molecule dressing

TL;DR

This paper introduces a Rydberg molecule dressing technique to generate strong, long-range, distance-selective interactions enabling rapid spin squeezing and complex many-body quantum dynamics in atomic systems.

Contribution

It presents a novel Rydberg molecule dressing scheme that achieves distance-selective long-range interactions with high interaction-to-dephasing ratio, facilitating fast spin squeezing.

Findings

Enables fast spin squeezing with several tens of atoms.

Achieves high ratio of dressed interaction to dephasing rate.

Provides a new platform for many-body quantum dynamics and quantum information processing.

Abstract

We propose a Rydberg molecule dressing scheme to create strong and long-ranged interactions at selective distances. This is achieved through laser coupling ground-state atoms off-resonantly to an attractive molecular curve of two interacting Rydberg atoms. Although dephasing due to Rydberg state decay occurs in all dressing schemes, an advantage of the molecule dressing is that a large ratio of dressed interaction to dephasing rate can be realized at large atomic separations. In an optical lattice or tweezer setting, we show that the strong interaction permits the fast generation of spin squeezing for several tens of dressed atoms. The proposed setting offers a new route to study complex many-body dynamics and to realize quantum information processing with non-convex long-range interactions.