Resonant control of spin dynamics in ultracold quantum gases by microwave dressing

TL;DR

This paper demonstrates how off-resonant microwave fields can control spin oscillations in ultracold quantum gases, enabling resonance tuning and potential creation of flat samples with specific site occupations.

Contribution

It introduces a method to manipulate spin dynamics in optical lattices using microwave dressing, providing a new tool for quantum control in ultracold gases.

Findings

Microwave fields can tune spin oscillations into resonance or suppress them.

Energy shifts induced by microwaves enable control over spin dynamics.

Proposed scheme for creating flat samples with specific site occupations.

Abstract

We study experimentally interaction-driven spin oscillations in optical lattices in the presence of an off-resonant microwave field. We show that the energy shift induced by this microwave field can be used to control the spin oscillations by tuning the system either into resonance to achieve near-unity contrast or far away from resonance to suppress the oscillations. Finally, we propose a scheme based on this technique to create a flat sample with either singly- or doubly-occupied sites, starting from an inhomogeneous Mott insulator, where singly- and doubly-occupied sites coexist.