标题： 原子与陈绝缘体之间的卡西米尔-波尔德相互作用：拓扑特征和长程排斥 显示英文标题

标题： Casimir-Polder interaction between an atom and a Chern insulator: topological signature and long-range repulsion

摘要： 我们考虑两个能级原子系统与陈绝缘体之间的卡西米尔-波尔德相互作用，包括共振和非共振通道。 对于靠近具有负陈数$C$的陈绝缘体的右旋圆偏振激发原子态，共振卡西米尔-波尔德力在较大范围的分离距离内可以单调地表现为排斥力。 在存在相同陈绝缘体的情况下，右旋圆偏振的亚稳原子态预计在远场区域的一定原子-表面分离范围内会经历排斥性的非共振卡西米尔-波尔德力。 在更远的分离距离下，非共振卡西米尔-波尔德力预计会变为吸引力，并表现出拓扑特征，与$(C\alpha)^2/(1+(C\alpha)^2)$成正比，其中$\alpha$是精细结构常数。 显示英文摘要

摘要： We consider the Casimir-Polder interaction between a two-level atomic system and a Chern insulator for both the resonant and nonresonant channels. For a right circularly polarized excited atomic state near a Chern insulator with a negative Chern number $C$, the resonant Casimir-Polder force can be monotonically repulsive over a large range of separations. In the presence of the same Chern insulator, a right circularly polarized metastable atomic state is expected to experience a repulsive nonresonant Casimir-Polder force over a certain range of atom-surface separations in the far-field region. At still greater separations, the nonresonant Casimir-Polder force is expected to become attractive and exhibit a topological signature, being proportional to $(C\alpha)^2/(1+(C\alpha)^2)$, where $\alpha$ is the fine-structure constant.