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Demosthene
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23 votes
1 answer
798 views

Linear response theory for Gross Pitaevskii equation

  • 307
11 votes
0 answers
387 views

Is the QCD Lagrangian without a $\theta$-term invariant under large gauge transformations?

  • 9,301
7 votes
4 answers
1k views

Representation under which Pauli matrices transform

  • 538
2 votes
1 answer
753 views

4-vector from a spinor

  • 1,239
2 votes
1 answer
377 views

How can we derive the gauge field Lagrangian?

  • 29
2 votes
1 answer
819 views

Calculating vertex factor for scalar field theory

2 votes
0 answers
161 views

Integrals of the form $\int\frac{d^Dk}{(2\pi)^D} \frac{1}{k^{2n}}$ in $D=4-2\varepsilon$ dimensions?

1 vote
1 answer
369 views

Diffeomorphism invariance and correlation functions

  • 2,953
1 vote
0 answers
108 views

What is the spectrum of the 1+1d Abelian Higgs model?