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schris38
  • Member for 4 years, 10 months
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7 votes
3 answers
1k views

Local gauge transformations and Noether Current

13 votes
2 answers
1k views

Basic Facts about Lie Algebras

2 votes
1 answer
794 views

Fourier transformed functional integral

2 votes
1 answer
722 views

Fock Space and Coherent state

3 votes
2 answers
557 views

BRST Symmetry and Single Particle States

3 votes
2 answers
495 views

Renormalization of the photon propagator at loop-level

2 votes
1 answer
473 views

Temperature of quantum fields and periodicity

5 votes
1 answer
432 views

Renormalization conditions on $\phi^4$ theory

5 votes
1 answer
414 views

The Faddeev-Popov generating functional and its independence on the gauge-fixing function

3 votes
2 answers
374 views

Invariants of inner product in pseudoreal representation of $SU(2)$

2 votes
2 answers
354 views

Greens Functions in Birrell and Davies "QFT in Curved Space" book

4 votes
1 answer
349 views

On the Ward Identity in QED

2 votes
1 answer
347 views

Loop-Level Calculation and Renormalization Applied to a Real Interaction in QED

3 votes
1 answer
322 views

Green Function expressed in terms of Hankel function (of the second kind)

3 votes
3 answers
320 views

Power emitted during thermal radiation

8 votes
1 answer
311 views

Why the Feynman diagrams contributing to the effective action $\Gamma[\phi_{\rm cl}]$ are stripped/amputated/have no external lines?

2 votes
2 answers
301 views

Renormalization and virtual soft divergences

3 votes
0 answers
290 views

Understanding the factorization of subleading soft contributions-massless QED

3 votes
1 answer
273 views

Propagator in Large Momentum Shell - Renormalization Group

3 votes
0 answers
265 views

Faddeev - Kulish paper questions

2 votes
1 answer
251 views

Applying the Optical Theorem in Non-Abelian Gauge Theories

4 votes
1 answer
249 views

Symmetry implies Ward identity

4 votes
1 answer
237 views

Subleading soft theorem and gauge invariance

3 votes
1 answer
228 views

In and out states of scattering in Asymptotically flat spacetimes

1 vote
1 answer
218 views

Fermion Propagator

5 votes
1 answer
215 views

Virtual soft photon exponentiation

1 vote
0 answers
210 views

Question on the Background Field Method for Non-Abelian Gauge theory

1 vote
0 answers
188 views

Lorentz invariance and Dirac Slash Notation

1 vote
2 answers
188 views

Massless QED modified Lagrangian

1 vote
1 answer
185 views

On the renormalization condition of the QED vertex function