Repulsion, induced from quantum vacuum fluctuations, for an anisotropically polarizable atom on the symmetry axis of an anisotropically polarizable annular disk is studied. There exist two torsion-free points on each side of the annular disk, where the interaction energy is orientation independent. The position of the second of the two torsion-free points, on either side of the disk, is shown to determine the orientation dependence of the atom at distances far from the plate, revealing a geometrical dependence. In the ring limit of the annular disk, an additional region of repulsion emerges.

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Casimir-Polder 排斥的几何相关性

研究了由量子真空涨落引起的斥力，用于各向异性极化环形盘对称轴上的各向异性极化原子。在环形盘的每一侧存在两个无扭转点，其中相互作用能与方向无关。两个无扭转点中第二个点的位置在圆盘的任一侧，用于确定远离盘的原子的方向依赖性，揭示了几何依赖性。在环形盘的环形边界处，出现了一个额外的排斥区域。