Repulsive and attractive Casimir forces in a glide-symmetric geometry
Repulsive and attractive Casimir forces in a glide-symmetric geometry
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DOI：
10.1103/physreva.77.062107
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发表时间：
2008-02
影响因子：
2.9
通讯作者：
Alejandro W. Rodriguez;J. Joannopoulos;Steven G. Johnson
中科院分区：
文献类型：
--
作者：
Alejandro W. Rodriguez;J. Joannopoulos;Steven G. Johnson
我们描述了一个三维几何结构，该几何结构使用普通金属材料表现出排斥卡西米尔力，通过精确的数值方法计算（没有不受控制的近似）。几何结构包括一个拉链状，滑动对称结构，由连接在平行板上的交错金属支架组成。根据分离的不同，板/支架之间的垂直力从吸引（大的分离）到排斥（中距离），再回到吸引（近的分离），在垂直方向上有一个稳定的平衡点。这种几何形状是由表面之间的吸引力相互作用的简单直觉所激发的，因此我们也考虑了如何将成对吸引力的粗略接近力近似与精确计算相比较。
We describe a three-dimensional geometry that exhibits a repulsive Casimir force using ordinary metallic materials, as computed via an exact numerical method (no uncontrolled approximations). The geometry consists of a zippelike, glide-symmetric structure formed of interleaved metal brackets attached to parallel plates. Depending on the separation, the perpendicular force between the plates/brackets varies from attractive (large separations) to repulsive (intermediate distances) and back to attractive (close separations), with one point of stable equilibrium in the perpendicular direction. This geometry was motivated by a simple intuition of attractive interactions between surfaces, and so we also consider how a rough proximity force approximation of pairwise attractions compares to the exact calculations.