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Adam's user avatar
Adam
  • Member for 10 years, 5 months
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47 votes
Accepted

Why do we expect our theories to be independent of cutoffs?

23 votes

Why are all force particles bosons?

22 votes
Accepted

How to understand the idea of functional renormalization group?

21 votes

Difference between gapless excitations and Goldstone bosons in Condensed matter physics

17 votes

How are anyons possible?

15 votes

How exact is the analogy between statistical mechanics and quantum field theory?

15 votes

What is off-diagonal long range order in superfluid?

14 votes
Accepted

Quantum field theory: zero vs. finite temperature

14 votes

Why are we allowed to divide by $\psi$ when $\psi=0$?

13 votes
Accepted

When is Schwartz's method for "integrating out" a field valid?

13 votes

Why cannot fermions have non-zero vacuum expectation value?

12 votes
Accepted

Can renormalization group evolution be used to capture emergence?

11 votes

What is the Kosterlitz -Thouless transition?

11 votes
Accepted

Some conceptual questions on the renormalization group

11 votes

What exactly is $\hat{\psi}^\dagger(x)$? An operator or a function?

11 votes
Accepted

Why can consistent QFTs only arise from CFTs?

10 votes

Hubbard-Stratonovich transformation and mean-field approximation

10 votes

Divergent bare parameters/couplings: what is the physical meaning of it? Do this have any relation with wilson's renormalization group approach?

10 votes
Accepted

Do we have magnetic monopole? Is charge, according to yesterdays paper on Nature by Ray-Roukokoski-Kandel-Möttönen-Hall (30.01.14) quantized?

10 votes

Uses of effective action and effective potential

9 votes
Accepted

Can Feynman diagrams be used to represent any perturbation theory?

9 votes

Why under Lorentz transformations the Higgs boson is a scalar field and under $SU(2)$ it is a doublet?

9 votes
Accepted

Strange definition of microcanonical partition function

9 votes
Accepted

Why, in quantum field theory, is $\hat{a}(p)|0\rangle=0$?

9 votes

Effect of linear terms on a QFT

8 votes
Accepted

Self-energy, 1PI, and tadpoles

8 votes
Accepted

How are superconductors discovered?

8 votes
Accepted

What is a degenerate Fermi gas?

8 votes
Accepted

How is domain wall formation related to spontaneous symmetry breaking?

8 votes
Accepted

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

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