AI 中文总结
本文构建双相互作用原子耦合单模腔的Dicke模型，研究原子-原子相互作用对超辐射临界性的影响，发现其可改变相变边界、抑制耦合阈值并调控普适类，还探讨了耗散下的相变与动力学。
AI 中文摘要
辐射体间的相互作用是控制集体光-物质现象的有力手段，但其在超辐射临界性中的作用尚未得到充分研究。本文构建了一个可提供解析见解的最简模型——耦合于单模腔的两个相互作用原子构成的Dicke模型，以研究此类相互作用效应。研究表明，该相互作用会改变相变边界，甚至可能完全抑制超辐射所需的原子-光子耦合阈值，并改变相变的普适类。我们进一步研究了存在光子损耗、自旋弛豫等耗散通道时的耗散相变与量子动力学。结果揭示了原子-原子相互作用的重要作用，以及如何通过调控该相互作用来控制原子-光子耦合。
英文摘要
Interactions among emitters provide a powerful means of controlling collective light--matter phenomena, yet their role in superradiant criticality has not been thoroughly investigated. Here we construct a minimal model that can yield analytical insights --- a Dicke model with two interacting atoms coupled to a single mode cavity --- to study such interaction effects. We show that interaction changes the phase boundary, and may even completely suppress the atom-photon coupling threshold for superradiance and change the universality class of the phase transition. We further study the dissipative phase transition and quantum dynamics in the presence of dissipation channels such as photon loss and spin relaxation. Our results demonstrate important roles played by the atom-atom interaction and how it can be engineered to control atom-photon coupling.
