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schris38
  • Member for 2 years, 11 months
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13 votes
2 answers
873 views

Basic Facts about Lie Algebras

8 votes
1 answer
123 views

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

6 votes
3 answers
146 views

Local gauge transformations and Noether Current

5 votes
1 answer
128 views

Renormalization conditions on $\phi^4$ theory

5 votes
1 answer
83 views

Conserved charge at null infinity associated with Large gauge transformation

4 votes
1 answer
122 views

Symmetry implies Ward identity

4 votes
1 answer
102 views

Virtual soft photon exponentiation

3 votes
0 answers
128 views

Faddeev - Kulish paper questions

3 votes
1 answer
108 views

Question about field configurations on the boundary of $\mathcal{I}^+$

3 votes
1 answer
95 views

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

3 votes
1 answer
119 views

On the Ward Identity in QED

3 votes
2 answers
284 views

BRST Symmetry and Single Particle States

3 votes
0 answers
55 views

Decomposition of the Photon Propagator into $K$ and $G$ propagators

3 votes
2 answers
76 views

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

3 votes
1 answer
46 views

Subleading soft theorem and gauge invariance

3 votes
1 answer
146 views

In and out states of scattering in Asymptotically flat spacetimes

3 votes
1 answer
81 views

Propagator in Large Momentum Shell - Renormalization Group

3 votes
0 answers
93 views

QED Soft Theorems and Momentum Conserving $\delta$ function

2 votes
1 answer
116 views

Fock Space and Coherent state

2 votes
2 answers
112 views

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

2 votes
1 answer
54 views

Renormalization and virtual soft divergences

2 votes
1 answer
54 views

Summing over zero mode energies

2 votes
1 answer
100 views

Applying the Optical Theorem in Non-Abelian Gauge Theories

2 votes
1 answer
71 views

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

1 vote
1 answer
93 views

Faddeev-Kulish Asymptotic Dynamics Question

1 vote
1 answer
84 views

Momentum integral yielding $\delta$ function

1 vote
0 answers
46 views

State time-evolution in the Interaction picture

1 vote
0 answers
42 views

Momentum Conserving Delta Function and Soft Gravitons

1 vote
0 answers
33 views

Photon Emission by Massless Fermions and Direction of Motion

1 vote
1 answer
95 views

Fourier transformed functional integral