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Andrew McAddams's user avatar
Andrew McAddams's user avatar
Andrew McAddams's user avatar
Andrew McAddams
  • Member for 10 years, 7 months
  • Last seen more than 9 years ago
38 votes
3 answers
6k views

The formal solution of the time-dependent Schrödinger equation

13 votes
1 answer
4k views

Kallen–Lehmann spectral representation for an arbitrary spin

12 votes
1 answer
2k views

LSZ reduction theorem derivation in Weinberg QFT

11 votes
2 answers
5k views

How to get Hamiltonian of QED from lagrangian?

11 votes
1 answer
3k views

How to prove that Weyl tensor is invariant under conformal transformations?

10 votes
1 answer
2k views

Question about Majorana fermions

10 votes
2 answers
931 views

Why do we must initially assume that the wavefunction is complex?

10 votes
1 answer
2k views

Chiral anomalies

9 votes
1 answer
3k views

What's the importance of conformal transformations in general relativity?

9 votes
4 answers
7k views

Why does the Standard Model predict Neutrinos are massless?

8 votes
1 answer
2k views

Connected and strongly connected Feynman diagrams

7 votes
2 answers
2k views

Spin-statistics theorem proof details

7 votes
1 answer
816 views

Why do we need to prove the gauge invariance of QED (or all of the gauge theories) on the Feynman diagrams language?

6 votes
1 answer
1k views

S-operator lorentz invariance

6 votes
0 answers
285 views

General relativity from helicity 2 massless field theory by using Deser's arguments

6 votes
2 answers
2k views

How to prove useful property of logarithm of generating functional in QFT?

6 votes
0 answers
404 views

One more time about Nordstrom theory

6 votes
1 answer
522 views

What do people mean by gauge invariance of the normalization of field?

6 votes
1 answer
1k views

Field action of linearized gravity associated with spin-2 particle in Thorne book

6 votes
1 answer
2k views

Pauli-Fierz "massive" equation and linearized gravity

6 votes
2 answers
1k views

What is the sense of introducing generating functional to the summands of expansion of S-matrix?

5 votes
1 answer
293 views

Some hints for special case of metric tensor in GR

5 votes
1 answer
124 views

Five-component field

5 votes
1 answer
476 views

Is there a method which quantizes non-abelian gauge theories without path integrals formalism?

5 votes
0 answers
1k views

Getting Slavnov-Taylor identity

5 votes
1 answer
169 views

Variational derivatives of strongly connected diagrams functional in gauge theory

5 votes
0 answers
325 views

Variations of S-matrix functional and Feynman diagrams in Weinberg QFT

4 votes
1 answer
455 views

Seesaw type-1 and integrating out heavy fields

4 votes
0 answers
661 views

Why do we use functional integration in QFT?

4 votes
3 answers
618 views

About constraints of the first class and electrodynamics