user avatar
user avatar
user avatar
gj255
  • Member for 8 years, 9 months
  • Last seen this week
31 votes
3 answers
6k views

Does QED really break down at the Landau pole?

23 votes
3 answers
13k views

Use of 'complete' as in 'complete set of states' or 'complete basis'

14 votes
1 answer
826 views

How is the Chern-Simons action well-defined?

12 votes
3 answers
4k views

What symmetry gives you charge conservation? [duplicate]

11 votes
3 answers
1k views

Why does $S = k_B \ln W$ not always apply?

11 votes
3 answers
3k views

Is thermodynamic reversibility a function of path?

9 votes
3 answers
3k views

Noether's theorem and time-dependent Lagrangians

9 votes
2 answers
928 views

Precise meaning of composition of ket and bra, e.g. $|\psi\rangle\langle\psi|$

9 votes
1 answer
851 views

Why aren't infinite-dimensional representations of the Poincaré group classified by *two* half-integers?

9 votes
1 answer
882 views

Positive frequency solutions in a stationary spacetime

8 votes
2 answers
1k views

Are fixed points of RG evolution really scale-invariant?

7 votes
1 answer
1k views

Feynman diagrams: sum of square of diagrams or square of sum of diagrams?

7 votes
1 answer
2k views

Lorentz transformations for scalar fields in QFT --- Peskin and Schroder

6 votes
1 answer
456 views

Noether's theorem for more interesting transformations of the time co-ordinate

6 votes
1 answer
532 views

Is ADM energy (momentum) conserved?

6 votes
0 answers
252 views

Is the vacuum degenerate in the Abelian Higgs model?

5 votes
2 answers
662 views

Bremsstrahlung and infrared divergences in Peskin & Schroeder 6.5

5 votes
2 answers
2k views

Canonical momentum density vs. energy-momentum tensor

5 votes
1 answer
142 views

Spin, statistics and neutron stars

5 votes
2 answers
2k views

Refractive index of dielectric in different frames of reference

4 votes
2 answers
1k views

How to see that $F$ $F$ dual is a surface term?

4 votes
2 answers
2k views

Matrix elements of linear operators - orthonormal basis required?

4 votes
2 answers
317 views

Reference request for non-perturbative QCD

4 votes
0 answers
412 views

Is Wick rotation of loop integrals legitimate?

4 votes
2 answers
822 views

What spinor field corresponds to a forwards moving positron?

3 votes
1 answer
325 views

Why not embed a spin-2 particle in an antisymmetric tensor field?

3 votes
0 answers
103 views

Galaxies moving in fixed background or fixed in expanding background

3 votes
1 answer
1k views

Information content of the electrostatic Maxwell equations vs Coulomb's Law vs Poisson's Equation

3 votes
1 answer
168 views

Why do we want GUT groups to be simple (rather than, say, semisimple)?

2 votes
1 answer
94 views

Is $E = p^0$ in non-inertial frames?