论文标题
Casimir-Polder拒绝中的几何依赖性：各向异性的两极分化原子和各向异性的可极化环向介电介质
Geometrical dependence in Casimir-Polder repulsion: Anisotropically polarizable atom and anisotropically polarizable annular dielectric
论文作者
论文摘要
casimir-polder相互作用的相互作用能量在各向异性上极化原子和环向介电的介电与特定构型中表现出局部排斥性远距离力。我们表明，当原子位于环形电介质的中心时，它在原子上有利于将其相对于介电的极化能力对齐。随着原子移开，但是沿环向介电的对称轴，它遇到了一个可极化原子没有扭矩并且能量不受方向依赖性的点。在这个高度上，原子更喜欢将其垂直于介电的极化能力定向。对于某些配置，它遇到了另一个无扭转点的距离，距离距离更大，它更喜欢再次指向其相对于介电的极化性。我们发现何时原子足够接近并定向使能量接近最大值，可以将原子排斥。对于某些环形极化，排斥可能会发生在无扭转的高度以下或之上。当原子与环相互作用时，定性特征有所不同，而无限范围用一个孔进行了不同。特别是，原子可以更喜欢与板块垂直于较大距离的极化性定向，与期望它会平行的期望形成鲜明对比。为了了解这种差异，我们调查了一个环形盘，该椎间盘在限制情况下捕获了两种几何形状的结果。这些能量对于立即应用太弱了，但是，我们使用这些配置详细阐述了Casimir机器原型上的有趣应用。
Casimir-Polder interaction energies between a point anisotropically polarizable atom and an annular dielectric are shown to exhibit localized repulsive long-range forces in specific configurations. We show that when the atom is positioned at the center of the annular dielectric, it is energetically favorable for the atom to align its polarizability with respect to that of the dielectric. As the atom moves away from, but along the symmetry axis of the annular dielectric, it encounters a point where the polarizable atom experiences no torque and the energy is free of orientation dependence. At this height, abruptly, the atom prefers to orient its polarizability perpendicular to that of the dielectric. For certain configurations, it encounters another torsion-free point a larger distance away, beyond which it prefers to again point its polarizability with respect to that of the dielectric. We find when the atom is close enough, and oriented such that the energy is close to maximum, the atom could be repelled. For certain annular polarizations, repulsion can happen below or above the torsion-free height. Qualitative features differ when the atom is interacting with a ring, versus a plate of infinite extent with a hole. In particular, the atom can prefer to orient perpendicular to the polarizability of the plate at large distances, in striking contrast to the expectation that it will orient parallel. To gain insight of this discrepancy, we investigate an annular disc, which captures the results of both geometries in limiting cases. These energies are too weak for immediate applications, nevertheless, we elaborate an interesting application on a prototype of a Casimir machine using these configurations.
