P. C. Spaniel's user avatar
P. C. Spaniel's user avatar
P. C. Spaniel's user avatar
P. C. Spaniel
  • Member for 7 years, 7 months
  • Last seen this week
21 votes
3 answers
4k views

Is the universe non-linear?

20 votes
2 answers
4k views

What new features does the Heisenberg Model have compared to the Ising Model?

16 votes
3 answers
910 views

Why does Critical Points have fluctuations on all scales (Infinite correlation length)?

15 votes
2 answers
2k views

How do the infinite dimensional representations of the Poincaré group work?

15 votes
3 answers
3k views

What is the Spectral Form Factor?

14 votes
6 answers
1k views

Is the Green function of electromagnetism a scalar or a tensor?

14 votes
1 answer
1k views

Wick rotation vs. Feynman $i\varepsilon$-prescription

10 votes
4 answers
2k views

Does the Hilbert space include states that are not solutions of the Hamiltonian?

9 votes
2 answers
300 views

Can't the Higgs vacuum be a superposition?

9 votes
4 answers
1k views

Perturbation Theory and Thermodynamic Limit

9 votes
3 answers
2k views

How to write down the collision integral for any interaction in the Boltzmann equation?

8 votes
2 answers
417 views

Horizons and other special surfaces on Kerr metric

8 votes
2 answers
264 views

"No local gauge invariant observables in gravity"... Is it a classical or quantum statement?

8 votes
4 answers
2k views

Third Kepler law and mass dependance

8 votes
1 answer
2k views

Different Schwinger-Dyson Equations

8 votes
2 answers
2k views

Interpretation of the field strength tensor in Yang-Mills Theory

8 votes
1 answer
2k views

Why does the quarks binding energy add mass to nucleons instead of reducing it? [duplicate]

7 votes
1 answer
215 views

Gauge theories, boundaries and Wilson lines

6 votes
1 answer
547 views

Question about a 2D Harmonic Oscillator with incommensurate frequencies and Integrability

6 votes
1 answer
338 views

Question about path integral step of the rindler decomposition

6 votes
0 answers
1k views

Do we know the exact ground state of the Antiferromagnetic Heisenberg Model?

5 votes
2 answers
1k views

Does every regularization/renormalization approach gives running coupling constants?

5 votes
4 answers
1k views

Motivation for the use of 1-forms in General Relativity

5 votes
1 answer
454 views

Different purposes for using the Large-$N$ Expansion

5 votes
4 answers
307 views

Does any unifying theory explain why nature is Chiral?

5 votes
1 answer
554 views

What's the difference between a post-Minkowskian approximation and a post-Newtonian one?

5 votes
1 answer
299 views

Can we add the resistivity due to different scattering mechanisms?

5 votes
1 answer
342 views

Meaning of "Exactly solvable in the large $N$ limit" for the SYK model

5 votes
1 answer
129 views

Motivation for introducing ladder operators for the simple harmonic oscillator in quantum mechanics

4 votes
2 answers
102 views

How to distinguish Coulomb and radiative parts of the electromagnetic field?

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