论文标题
随机性辅助指数层次结构
Randomness-Assisted Exponential Hierarchies
论文作者
论文摘要
受到凝结物质系统中定位现象的启发,我们探索了多个标量场理论空间中的构造,其中指数抑制的耦合可能源自随机参数。特别是,我们发现了一类新的非本地理论空间模型,在该模型中,非贴剂位点的标量场相互作用,但与位点分离呈指数衰减的优势。与仅基于原始安德森本地化模型的局部理论空间方案相比,这种模型的本地理论空间方案可能具有非常不同的本地化属性。更具体地说,我们发现特定的非本地相互作用模式导致了两个最轻的特征状态的双定位。随机定位(因此,指数定位(因此被指数抑制)仅在引入随机性时立即出现,无论它多么微小。我们还讨论了模型的变体以及可能的紫外线完成。
Inspired by the localization phenomenon in condensed matter systems, we explore constructions in the theory space of multiple scalar fields, in which exponentially suppressed couplings could originate from random parameters. In particular, we find a new class of non-local theory space models, in which scalar fields at non-adjacent sites interact with each other but with strengths decaying exponentially with the site separation. Such a model could have very different localization properties, compared to the local theory space scenarios with only nearest-site interactions, based on the original Anderson localization model. More specifically, we find that a particular non-local interaction pattern leads to bi-localization of the two lightest eigenstates. Exponential localization (and thus exponentially suppressed couplings) then emerges only and immediately when randomness is introduced, no matter how tiny it is. We discuss variants of the model and possible UV completions as well.