关于光剑的物理（非）可能性
On the physical (im)possibility of lightsabers
摘要：
在本文中，我们使用一个科幻小说的主题（即从星球大战宇宙的标志性光剑）作为教学工具，介绍由于量子真空的非线性电动力学方面的观众与本科物理背景。特别是，我们专注于光剑的一个主要问题，通常被引用作为一个论点来驳回它们是不现实的：光刃不是实心的，因此不能像普通的剑那样用于决斗。使用来自超强激光科学的技术，我们表明，对于足够高的激光强度，两个光剑刀片可以“感觉”对方固体。我们认为，这方面的光剑是不可能的，由于物理定律的限制，但由于其操作所需的高强度和能量是非常难以置信的。
英文摘要：
In this paper, we use a science fiction theme (i.e. the iconic lightsaber from the Star Wars universe) as a pedagogical tool to introduce aspects of nonlinear electrodynamics due to the quantum vacuum to an audience with an undergraduate physics background. In particular, we focus on one major problem with lightsabers that is commonly invoked as an argument to dismiss them as unrealistic: light blades are not solid and thus cannot be used in a duel as normal swords would. Using techniques coming from ultra intense laser science, we show that for high enough laser intensities, two lightsaber blades can `feel' solid to each other. We argue that this aspect of lightsabers is not impossible due to limitations of the laws of physics, but is very implausible due to the high intensities and energy needed for their operation.
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