User CBBAM

3 votes

1 answer

127 views

Amputated connected 2-point function is inverse to connected 2-point function

asked Feb 29 at 4:14

3 votes

0 answers

211 views

How is Wick rotation an analytic continuation?

asked Feb 16 at 4:15

3 votes

2 answers

93 views

In what sense is $\int (u \cdot \nabla) u \cdot u dx$ an energy flux?

asked Apr 15 at 18:50

3 votes

0 answers

85 views

How does the introducing antiparticles justify the Klein-Gordon equation being second order in time?

asked Jul 27 at 20:35

3 votes

1 answer

185 views

How does the presence of a Landau pole suggest a theory is trivial?

asked Oct 26 at 8:27

3 votes

2 answers

286 views

Integrating high momentum modes using Wilson's approach to renormalization

asked Mar 19, 2023 at 4:41

3 votes

4 answers

1k views

What exactly is field strength renormalization?

asked Apr 6, 2023 at 7:50

3 votes

1 answer

415 views

What is the "volume of the gauge group"?

asked Apr 10, 2023 at 19:08

3 votes

1 answer

380 views

What exactly is an infinitesimal symmetry?

asked May 8, 2023 at 20:38

3 votes

3 answers

825 views

Confusion of variable vs path in Euler-Lagrange equation, Hamiltonian mechanics, and Lagrangian mechanics

asked Sep 18, 2023 at 23:54

3 votes

3 answers

222 views

How to think of Lagrangians? [duplicate]

asked Sep 20, 2022 at 19:40

3 votes

1 answer

346 views

How does turbulence arise from Navier-Stokes?

asked Feb 27, 2022 at 22:55

2 votes

1 answer

197 views

Vortex line, tube, sheet, and filament

asked Sep 7, 2022 at 20:36

2 votes

0 answers

81 views

Interpreting scattering operators

asked Dec 17, 2022 at 20:55

2 votes

1 answer

429 views

Understanding operator valued distributions

asked Sep 27, 2022 at 18:43

2 votes

0 answers

49 views

How are point-dependent concepts such as correlation functions, renormalization, cluster decomposition...etc interpreted in axiomatic QFT?

asked Sep 27, 2023 at 20:25

2 votes

1 answer

375 views

How are Schwinger and Wightman functions used in practice?

asked Feb 16, 2023 at 4:08

2 votes

1 answer

353 views

Why do we Wick rotate before regularizing Feynman diagrams?

asked Jan 7, 2023 at 8:50

2 votes

1 answer

75 views

Do quarks in QCD belong to $\mathbb{C}^3$ or $\mathbb{C}^4$?

asked Oct 27 at 18:52

2 votes

1 answer

107 views

Equivalent definitions of Wick ordering

asked Apr 12 at 22:52

2 votes

3 answers

214 views

Motivation for pure Yang-Mills Lagrangian

asked Jun 13 at 1:44

2 votes

1 answer

118 views

Understanding the Gaussian weight and the parameter $\xi$ when quantizing gauge theories

asked Jun 13 at 5:50

2 votes

1 answer

93 views

Understanding the field strength tensor $F_{\mu\nu}$ as a commutator

asked Jul 25 at 4:35

2 votes

1 answer

120 views

Must all correlation functions come from a measure?

asked Nov 5 at 19:20

2 votes

0 answers

43 views

How are Fermionic and vector valued quantum field theories rigorously defined?

asked Nov 23 at 6:05

2 votes

1 answer

142 views

Physical motivation behind the relationship between spin, $SO(3)$, and angular momentum

asked Feb 14 at 1:51

2 votes

1 answer

173 views

Why is the spectrum of the momentum operator continuous for states containing 2 or more particles?

asked Feb 6 at 19:00

2 votes

0 answers

109 views

Why is the general solution of the Klein-Gordon equation a distribution? [closed]

asked Dec 6, 2023 at 21:26

2 votes

1 answer

121 views

Understanding $W^{(n)}$, $\Gamma^{(n)}$, and $\Sigma$ in Feynman diagrams

asked Mar 28 at 22:42

2 votes

1 answer

71 views

Expanding the generating functional $W[J]$ for connected diagrams as a power series in $\hbar$

asked Mar 8 at 3:58

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134 Questions

Amputated connected 2-point function is inverse to connected 2-point function

How is Wick rotation an analytic continuation?

In what sense is $\int (u \cdot \nabla) u \cdot u dx$ an energy flux?

How does the introducing antiparticles justify the Klein-Gordon equation being second order in time?

How does the presence of a Landau pole suggest a theory is trivial?

Integrating high momentum modes using Wilson's approach to renormalization

What exactly is field strength renormalization?

What is the "volume of the gauge group"?

What exactly is an infinitesimal symmetry?

Confusion of variable vs path in Euler-Lagrange equation, Hamiltonian mechanics, and Lagrangian mechanics

How to think of Lagrangians? [duplicate]

How does turbulence arise from Navier-Stokes?

Vortex line, tube, sheet, and filament

Interpreting scattering operators

Understanding operator valued distributions

How are point-dependent concepts such as correlation functions, renormalization, cluster decomposition...etc interpreted in axiomatic QFT?

How are Schwinger and Wightman functions used in practice?

Why do we Wick rotate before regularizing Feynman diagrams?

Do quarks in QCD belong to $\mathbb{C}^3$ or $\mathbb{C}^4$?

Equivalent definitions of Wick ordering

Motivation for pure Yang-Mills Lagrangian

Understanding the Gaussian weight and the parameter $\xi$ when quantizing gauge theories

Understanding the field strength tensor $F_{\mu\nu}$ as a commutator

Must all correlation functions come from a measure?

How are Fermionic and vector valued quantum field theories rigorously defined?

Physical motivation behind the relationship between spin, $SO(3)$, and angular momentum

Why is the spectrum of the momentum operator continuous for states containing 2 or more particles?

Why is the general solution of the Klein-Gordon equation a distribution? [closed]

Understanding $W^{(n)}$, $\Gamma^{(n)}$, and $\Sigma$ in Feynman diagrams

Expanding the generating functional $W[J]$ for connected diagrams as a power series in $\hbar$