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maplemaple
  • Member for 6 years, 8 months
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36 votes
2 answers
1k views

Can we get complete non-perturbative information of the interacting system by computing perturbation to all orders?

35 votes
1 answer
3k views

What's the relation between Wilson Renormalization Group (RG) in Statistical Mechanics and QFT RG?

23 votes
3 answers
2k views

How to rigorously argue that the superposition state is unstable in spontaneously symmetry breaking case

20 votes
2 answers
4k views

Locality in QFT vs "non-local" in QM

16 votes
1 answer
2k views

Gauge invariance is just a redundancy. Why is massive abelian gauge field renormalizable but massive non-abelian gauge field nonrenormalizable?

13 votes
1 answer
1k views

What's the key point to argue that pure gravity can't be renormalizable from two-loop?

10 votes
1 answer
970 views

Why does Josephson's identity $d\nu=2-\alpha$ only hold for mean field theory in dimension $4$?

9 votes
2 answers
576 views

Question about the existence of non-Abelian anyon

9 votes
2 answers
734 views

Adding gauge fixing directly by hand is different from by Lagrange multiplier?

8 votes
2 answers
1k views

What's the geometric (or representation independent) definition of central charge of Lie algebra $\mathfrak{g}$?

8 votes
1 answer
837 views

For dimensional regularization, why the arbitrary mass scale $\mu$ has the meaning of UV cutoff?

8 votes
2 answers
1k views

Explicit computation of singular part of two-loop sunrise diagram

6 votes
1 answer
2k views

Book recommendations for learning about open quantum systems

6 votes
2 answers
527 views

Why is classical spin the spin-$\infty$ representation of $SO(3)$, not the spin-$1$ representation of $SO(3)$?

6 votes
1 answer
465 views

Condensed Matter or High Energy examples in which higher-loop $n\ge 2$ correction can have important physical consequence?

5 votes
2 answers
689 views

How is it possible a quadratic Hermitian Hamiltonian $H = b^\dagger b^\dagger + b b$, with $b$ boson, cannot be diagonalized?

3 votes
1 answer
156 views

Connected components of conformal group $ {\rm Conf}(p,q)$ containing $P$, $T$ and conformal inversion are same or different?

3 votes
1 answer
501 views

What's the Lie group generated only by dilation and Poincaré symmetry?

2 votes
2 answers
209 views

Transformation has $\delta \mathcal{L}=0$ but $\delta S \neq 0$ and $\delta S \neq \epsilon \int_{\partial\Omega} d^3 x f $

2 votes
1 answer
375 views

Is the conformal group $\mathrm{Conf}(p,q) ≃ \mathrm{O}(p + 1, q + 1) / \mathbb{Z_2} $ connected or not?

1 vote
1 answer
507 views

Question about Mode expansion of free compact boson

1 vote
1 answer
189 views

Question about a system with all bounded orbits closed and maximal integrable

0 votes
1 answer
355 views

Question about conformal transformation on fields