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

用于自旋系统量子模拟的微陷阱阵列中单个钾原子的确定性制备。

• 批准号: 316159385
• 负责人: Professor Dr. Christian Groß
• 金额: --
• 依托单位: Arbeitsbereich Atomphysik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/316159385?language=en
• 关键词: Deterministic; preparation; single; potassium; atoms

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.

该项目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。我们的目标是实现系统的远程相互作用和大小高达100个自旋，其中单自旋实验观察。为此，我们将提出一个最近证明的方法，在微阱中制备单原子。我们将利用钾的特殊性质，即1064 nm微陷阱的确定性加载的理想内部能级结构。这样，我们有信心将加载保真度提高到远超过最近为铷所证明的90%。二维微陷阱阵列具有灵活的几何形状调整的巨大优势。特别是，它们能够实现阵列与大的距离之间的单个陷阱，使这些陷阱中的原子之间的里德伯-里德伯相互作用的强度是在实验上可访问的范围内。基于微陷阱阵列，我们将研究远程相互作用的横向伊辛磁铁。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的范围。该项目将推动这一限制，使实验的制度，是无法访问的计算在经典计算机上。单原子灵敏的探测和实验的高数据率将允许量子磁体的精确表征在-以及不平衡。此外，我们将研究在非共振激光耦合里德伯气体的退相干。微阱阵列的优点是在这里的灵活的几何形状和可变的原子距离的中间系统的大小。我们的目标是深入了解相干限制过程，以及随后的最小化，在里德伯dressed系统。该项目属于多体物理类别的GiRyd优先计划。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。