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xzd209
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7 votes
1 answer
518 views

Must a time-reversal symmetric Hamiltonian really have $T^2 = \pm 1$?

6 votes
2 answers
367 views

Conflicting definitions of reference frames in general relativity

5 votes
1 answer
2k views

Two definitions of a macrostate

5 votes
1 answer
464 views

Constructing $SU(n)$ tensors

5 votes
1 answer
155 views

Justification for Wick rotation for topological insulator

4 votes
1 answer
72 views

Path integral derivation of exact identity for bosonic field

4 votes
0 answers
486 views

Sign in Peierls substitution

4 votes
0 answers
176 views

Deriving the Lagrangian of a set of interacting particles only from symmetry

3 votes
1 answer
147 views

Reducing the degrees of freedom of a Lagrangian in a spherical potential by using integrals of motion [duplicate]

3 votes
2 answers
966 views

What is the difference between a dual vector and a reciprocal vector?

3 votes
3 answers
635 views

‘Proof’ that non-Abelian Berry phase vanishes identically

3 votes
0 answers
365 views

Deriving Coulombs law from QED - why must the particles be distinguishable?

3 votes
2 answers
184 views

More than one 15 dimensional irrep of $\mathfrak{su}(3)$

3 votes
1 answer
138 views

Contractions in current-current correlator for Kubo formula

2 votes
0 answers
437 views

Computing symmetry/combinatorial factor for a diagram in $\phi^4$ theory

2 votes
0 answers
69 views

Lorentz covariant equation of motion without Lorentz invariant action

2 votes
0 answers
410 views

Is there any reason that Landau and Lifshitz don't discuss Noether's theorem in their mechanics book? [closed]

2 votes
1 answer
238 views

Partial time derivative of the on-shell action

1 vote
0 answers
55 views

Change in Hamiltonian under infinitesimal canonical transformation [duplicate]

1 vote
1 answer
70 views

'Complex dimensions' in a metric

1 vote
1 answer
45 views

Complex pseudotensor generalisation [closed]

1 vote
0 answers
210 views

Angular momentum conservation in $e^-_{\text{R}}e^+_{\text{L}}\rightarrow\mu^-_{\text{R}}\mu^+_{\text{L}}$ scattering

1 vote
1 answer
71 views

Non-Abelian anomaly: why does non-Hermitian operator have complete basis of eigenvectors?

1 vote
0 answers
106 views

Non-unitary magnetic translation operator for Landau levels

0 votes
1 answer
78 views

Plaquette operator in Kitaev honeycomb model