Depending on the point of view, the Casimir force arises from variation in the energy of the quantum vacuum as boundary conditions are altered or as an interaction between atoms in the materials that form these boundary conditions. Standard analyses of such configurations are usually done in terms of ordinary, equal-time (Minkowski) coordinates. However, physics is independent of the coordinate choice, and an analysis based on light-front coordinates, where $x^+\equiv t+z/c$ plays the role of time, is equally valid. After a brief historical introduction, we illustrate and compare equal-time and light-front calculations of the Casimir force.

中文翻译：

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光锋上的卡西米尔力

根据不同的观点，卡西米尔力是由量子真空能量的变化引起的，因为边界条件改变或形成这些边界条件的材料中的原子之间的相互作用。此类配置的标准分析通常根据普通的等时 (Minkowski) 坐标进行。然而，物理学与坐标选择无关，基于光前坐标的分析，其中 $x^+\equiv t+z/c$ 扮演时间的角色，同样有效。在简要的历史介绍之后，我们说明和比较了卡西米尔力的等时和光前计算。