Coherent Spin Dynamics in 2D Arrays of Rydberg Atoms

该项目旨在为里德堡多体物理学建立一个新的范式。它的优势来自于我们基于单原子的多体Rydberg架构的独特功能，这在其他实现中迄今为止是不可用的：我们将在可重新配置的二维和分层三维几何结构中，基于具有单点寻址能力的偶极阱阵列，放置数百个精确定义位置的铷原子。阵列中的单个原子可以通过光学双光子跃迁被激发到aRydberg态。同时，利用微波场与寻址光场相结合的方法可以获得其他的里德伯态。这个独特的平台将使我们能够利用相同里德伯态原子之间的范德华式相互作用，以及两个不同里德伯态原子之间的共振偶极相互作用。完全控制几何高达三维，相互作用参数和原子数使我们能够设计有效的自旋1/2哈密顿与伊辛型相互作用（范德华）和xy型相互作用（偶极）。在系统的时间演化过程中，我们对原子的内部和外部状态保持着高度的控制。这使我们对量子多体系统的动力学行为有了新的认识。

This project is aiming towards establishing a new paradigm forRydberg many-body physics. It draws its strength from the uniquefeatures of our single-atom based many-body Rydberg architecture,which has not been available in other implementations so far: We willplace well defined sets of up to a few hundred single rubidium atomsat exactly defined locations in re-configurable 2D and layered 3Dgeometries, based on dipole trap arrays with single-siteaddressability. Individual atoms in the array can be excited to aRydberg state by an optical two-photon transition. Simultaneously,other Rydberg states are accessible by applying a microwave field incombination with an addressing light field. This unique platform willenable us to exploit van-der-Waals type interactions between atoms inthe same Rydberg state as well as resonant dipolar interactionsbetween atoms in two different Rydberg states. Full control of thegeometry in up to three dimensions, interaction parameters, and atomnumber allows us to engineer effective spin-1/2 Hamiltonians withIsing-type interactions (van der Waals) and XY-type interactions(dipolar). During the temporal evolution of the system we maintain ahigh level of control of the internal and external states of the atoms.This enables us to gain novel insight in the dynamical behavior of thequantum many-body system.