The quantum eraser is a variation of the celebrated Young’s interference experiment that can be used to demonstrate the elusive complementarity principle in quantum physics. Here we show the construction of its classical analogue for deployment in classrooms in a simple, cost-effective yet robust manner by employing a laser pointer, double-slits, and polarizers.

中文翻译：

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经济高效的量子橡皮擦演示

量子橡皮擦是著名的杨氏干涉实验的变体，可用于证明量子物理学中难以捉摸的互补原理。在这里，我们展示了通过采用激光指示器、双缝和偏振器，以简单、经济且坚固的方式部署在教室中的经典模拟的构造。