Ordinarily, light waves pass through each other without any trouble. But when quantum mechanics is involved, something strange happens.
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121 sats \ 0 replies \ @south_korea_ln 31 Jul
As a side note, the following was one of my first "awe" experiences during one of my QFT courses during grad school, i.e., the Casimir effect, which states that two plates can feel a force acting on each other _in the vacuum, that is, in the absence of any matter. This can be explained by the creation of virtual particles that pop in and out of existence. The vacuum cannot have zero energy because of this vacuum energy.
This kind of super-small incremental precision improvements felt too abstract to me. Even though this kind of physics looked amazing, I didn't see myself working in this field.
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