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Pair production is the creation of an elementary particle and its antiparticle out of a neutral boson, typically a photon, but sometimes a gluon.

1 vote
0 answers
38 views

Schwinger approach using the heat kernel [closed]

I am having trouble calculating the effective action for a constant magnetic background. The calculations I am trying to replicate are from this paper: https://arxiv.org/abs/hep-th/9807031. The effect …
Matthijs's user avatar
2 votes
1 answer
123 views

Euler-Heisenberg Lagrangian & heat kernel: Why do we need to substitute $s \to -is$ to conti...

Starting from the general effective lagrangian for a constant background electromagnetic field, $$\mathcal{L}_{\mathrm{EH}}=-\frac{1}{4}F_{\mu\nu}^{2}-\frac{e^{2}}{32\pi^{2}}\int_{0}^{\infty}\frac{ds} …
Matthijs's user avatar
2 votes
0 answers
17 views

Underlying correspondence of calculating the imaginary part of the effective Lagrangian in sQED

I was wondering if there is a correspondence/underlying equivalence between the heat kernel, tunnelling, and Bogolubov approaches for calculating the imaginary part of the effective Lagrangian in sQED …
Matthijs's user avatar