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Styg
  • Member for 8 years, 4 months
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4 answers
111 votes
15k views
134 bookmarks
Intuitively, why are bundles so important in Physics?
1 answer
79 votes
6k views
104 bookmarks
Why exactly do sometimes universal covers, and sometimes central extensions feature in the application of a symmetry group to quantum physics?
5 answers
67 votes
9k views
24 bookmarks
Why do we need large particle accelerators?
5 answers
51 votes
9k views
36 bookmarks
Tree-level QFT and classical fields/particles
5 answers
39 votes
7k views
34 bookmarks
Normalizable wavefunction that does not vanish at infinity
2 answers
35 votes
4k views
29 bookmarks
What's the deal with momentum in the infinite square well?
4 answers
31 votes
6k views
46 bookmarks
Equivalence between Hamiltonian and Lagrangian Mechanics
5 answers
26 votes
4k views
21 bookmarks
How can there be net linear momentum in a static electromagnetic field (not propagating)?
1 answer
23 votes
9k views
19 bookmarks
Lagrangian of Schrodinger field
1 answer
20 votes
13k views
31 bookmarks
Constants of motion vs. integrals of motion vs. first integrals
1 answer
17 votes
3k views
26 bookmarks
On a trick to derive the Noether current
1 answer
17 votes
4k views
28 bookmarks
Why path integral approach may suffer from operator ordering problem?
5 answers
15 votes
2k views
11 bookmarks
Formalism to deal with discontinuous potentials in classical mechanics (hard wall, hard spheres)
1 answer
14 votes
3k views
25 bookmarks
Correlation function which has branch cut in momentum space
3 answers
10 votes
1k views
4 bookmarks
Question about the apparent loophole in principle of least action: boundary condition vs initial condition
2 answers
9 votes
609 views
10 bookmarks
Quantum mechanics with multiple values of $\hbar$
2 answers
9 votes
763 views
6 bookmarks
Why does normal ordering violate the Ward identity?
4 answers
5 votes
2k views
4 bookmarks
Is the momentum operator well-defined in the basis of standing waves?
1 answer
3 votes
2k views
8 bookmarks
Conformal properties of the energy-momentum tensor and Schwarzian derivative