Timeline for How does the $+i\varepsilon$ prescription in the propagator comes from analytic continuation of the Euclidean 2-point function?
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| Jan 26, 2023 at 12:43 | comment | added | Níckolas Alves | According to the reference you gave, there are branch cuts/points on interacting theories, but as far as I understand there are no such things in free theories. In this case, how can one choose different ordering conventions? | |
| Nov 3, 2021 at 3:19 | history | answered | Connor Behan | CC BY-SA 4.0 |