Light-matter interaction in quantum materials

在这个项目中，我们将解决嵌入（光学和微波）腔体的多体系统的行为。调查将特别集中在强相关和量子有序的2D系统。腔的存在使光与物质相互作用达到了超强极限，这反过来又会导致物质的新量子相的出现。该领域最近已成为一个热门话题，越来越多的论文（特别是实验）发表在控制量子相位实现货车德瓦尔斯材料。有趣的是，这些相位所获得的形式可能取决于为电磁辐射所选择的规范。最近，人们对模型系统（例如偶极系综或连续（jellium）模型）研究了这一事实。然而，还没有尝试在现实的材料模型中研究这种物理学，这将是本项目的重点。

In this project we will address the behaviour of many-body systems embedded in (optical and microwave) cavities. Investigations will focus in particular on strongly correlated and quantum ordered 2D systems. The presence of a cavity enables reaching the ultra-strong limit of light-matter interaction, which can in turn lead to the emergence of novel quantum phases of matter. The field has recently emerged as a hot topic, with more and more papers (in particular experimental ones) being published on the control of quantum phases realised in van der Waals materials. Intriguingly, the form acquired by such phases can depend on the gauge chosen for the electromagnetic radiation. This fact has been recently studied for model systems such as ensembles of dipoles or continuous (jellium) models. However, no attempt has been made at investigating this physics in realistic models of materials, which will be the focus of this project.