名义上一维里德伯阵列中几何诱导的畴壁钉扎与ℤ₂不对称性
Geometry-Induced Domain-Wall Pinning and $\mathbb{Z}_2$ Asymmetry in Nominally One-Dimensional Rydberg Arrays
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中文总结 AI 辅助
本研究在QuEra的Aquila量子计算机上，于两种几何轮廓的名义一维里德伯阵列中，发现纯一维伊辛模型未预测的畴壁钉扎与ℤ₂对称性破缺效应，揭示了几何与相互作用对系统的调控作用。
中文摘要 AI 辅助
我们在QuEra的中性里德伯原子Aquila量子计算机上开展实验，对一维模型采用准绝热演化，通过硬件微调平衡近零净磁化的测量统计，涉及两种几何轮廓：含33个原子的闭合三角形模型，以及带工程原子空位的47个原子正方形模型。该处理器的特性限制了可编程原子的几何结构为二维平面。我们报告了纯一维伊辛模型未预测到的效应，如畴壁钉扎，以及范德瓦尔斯相互作用与里德伯阻塞相互作用共同导致的ℤ₂对称性破缺。具体而言，原子空位周围及一维正方形轮廓模型顶点处的原子强烈倾向于处于里德伯态，使有效模型在空位处呈现铁磁性键。
英文摘要
We perform experiments on QuEra's neutral-Rydberg-atom Aquila quantum computer, using quasi-adiabatic evolution on 1-dimensional models. We use hardware fine-tuning to balance the measurement statistics close to zero net magnetization, in two different geometric outlines: one closed triangular model with 33 atoms, and one 47-atom square with an engineered atom vacancy. The nature of this processor restricts the geometry of the atoms that can be programmed to a 2D plane. We report effects not predicted by the pure 1D Ising model, such as pinning of domain walls and $\mathbb{Z}_2$ symmetry breaking due to the interplay between van der Waals interactions and the Rydberg blockade. In particular, atoms around the atom vacancy and at the vertices of the 1-dimensional square-outline model strongly prefer the Rydberg state, leading to the effective model having a ferromagnetic bond across the vacancy.
