Question for the #QFT people here: What's your favourite way to explain the effective action Γ[Φ]?
The most frequent explanation I see is "quantum analogue of the classical action", but that doesn't really seem to cut it - after all, classical field theories work completely differently from quantum field theories. Most notably, in classical field theories, you don't have correlation functions - you just have a unique field that describes the current state of your system.
Vanessa Alexandra, B.Sc. /
npub1fn…jtj47
2024-07-15 08:44:04
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2024-07-15 08:44:04Event JSON
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