Deterministic preparation of single potassium atoms in microtrap arrays for the quantum simulation of spin systems.

该计划的目标是研究微阱阵列中确定性制备的里德伯多体系统。柔性合成量子磁体的实现将是该项目的重点。我们的目标是实现具有远程相互作用和大小达100个自旋的系统，其中单个自旋在实验中可观察到。为此，我们将提出一种在微阱中制备单原子的新方法。我们将利用钾的特殊性质，即理想的内部电平结构来确定加载1064nm微阱。通过这种方式，我们有信心将加载保真度提高到远远超过最近为铷展示的90%。二维微阱阵列具有灵活的几何调谐的巨大优势。特别是，它们能够实现在单个陷阱之间具有大距离的阵列，从而使这些陷阱中原子之间的Rydberg-Rydberg相互作用的强度在实验可达到的范围内。基于微阱阵列，我们将研究远距离相互作用的横向伊辛磁体。以前对这种系统的实验仅限于非常小的磁化强度或系统尺寸。这个项目将突破这一限制，使在经典计算机上无法计算的制度下进行实验成为可能。单原子灵敏的探测和实验的高数据率将允许量子磁体在平衡和非平衡状态下的精确表征。此外，我们将研究非共振激光耦合里德伯气体的退相干。微阱阵列的优势在于其灵活的几何结构和可变化的原子距离。我们的目标是深入了解相干限制过程，以及他们随后的最小化，在里德堡着装系统。该项目属于吉林优先项目的多体物理范畴。我们将与几个国家小组合作，对拟议实验的各个方面进行详细的理论描述。

The goal of the proposed project is the study of deterministically prepared Rydberg many-body systems in microtrap arrays. The realization of flexible synthetic quantum magnets will be in the focus of the project. We aim to realize systems with long-range interactions and sizes up to one hundred spins, in which single spins are experimentally observable. To this end, we will advance a recently demonstrated method for the preparation of single atoms in microtraps. We will utilize the special properties of potassium, that is, the ideal internal level-structure for deterministic loading of 1064nm microtraps. By that, we are confident to increase the loading fidelity well beyond the 90% recently demonstrated for Rubidium. Two-dimensional microtrap arrays come with the great advantage of flexible geometry tuning. In particular, they enable the realization of arrays with large distance between the individual traps, such that the strength of the Rydberg-Rydberg interaction between atoms in these traps is in the experimentally accessible range.Based on the microtrap array we will study long-range interacting transverse Ising magnets. Previous experiments on such systems were limited to the regime of very small magnetization or system size. This project will push this limit to enable experiments in regimes that are not accessible by calculations on classical computers. The single atom sensitive detection and the high data rate of the experiment will then allow for a precise characterization of the quantum magnets in- as well as out-of-equilibrium.Furthermore, we will study decoherence in off-resonantly laser coupled Rydberg gases. The advantage of the microtrap array is here the flexible geometry and variable atomic distances for intermediate system sizes. We aim at the in-depth understanding of coherence limiting processes, and their subsequent minimization, in Rydberg dressed systems.The project belongs into the many-body physics category of the GiRyd priority program. We will collaborate with several national groups for the detailed theoretical description of various aspects of the proposed experiments.