Abstract
Single neutral atoms trapped in optical tweezers and laser-coupled to Rydberg states provide a fast and flexible platform to generate configurable atomic arrays for quantum simulation. The platform is especially suited to study quantum spin systems in various geometries. However, for experiments requiring continuous trapping, inhomogeneous light shifts induced by the trapping potential and temperature broadening impose severe limitations. Here we show how Raman sideband cooling allows one to overcome those limitations, thus, preparing the stage for Rydberg dressing in tweezer arrays.
Highlights
Optical tweezers gained increasing interest, as they allow for fast preparation of single atoms in one, two or three dimensions with configurable geometries [1,2,3,4,5,6,7,8,9]
We cool the atoms close to the ground state and show that inhomogeneous light shifts and thermal broadening can be reduced to a negligible level
In this paper we report on the first realization of potassium-39 optical tweezer arrays to study Rydberg enabled many-body spin physics
Summary
Optical tweezers gained increasing interest, as they allow for fast preparation of single atoms in one, two or three dimensions with configurable geometries [1,2,3,4,5,6,7,8,9]. The atoms are typically at microkelvin temperatures after being loaded into the tweezers This leads to thermal broadening of the Rydberg transition. For high coherence one has to work at a comparably small detuning, typically of a few megahertz This is in the same order of magnitude as inhomogeneities and Doppler broadening. We cool the atoms close to the ground state and show that inhomogeneous light shifts and thermal broadening can be reduced to a negligible level. These improvements pave the way for coherent Rydberg dressing in tweezer arrays
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