The exponential of the derivative translates a function 𝑓(𝑥) by an amount εpic.twitter.com/mwQ1aLpOHt
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There's something I find very weird about assuming analyticity in physics. It basically means you are assuming perfect knowledge of what's going on outside of your lightcone, right? Which seems to me... odd.
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This is already over my head... How does that stop you knowing what's outside of your light cone? At least classically, analyticity means you would know, right?
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If the operators are local operators they by definition within the light cone .. if you have local operators + Lorentz invariant lagragian you’re good to go
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