User PPR

35 votes

2 answers

10k views

Energy-Momentum Tensor in QFT vs. GR

asked Jun 18, 2014 at 20:47

31 votes

1 answer

11k views

Software for calculating Feynman Diagrams

asked Feb 3, 2014 at 0:56

23 votes

2 answers

4k views

Yang-Mills CP violation

asked May 4, 2014 at 11:24

19 votes

1 answer

2k views

Faddeev-Popov Gauge-Fixing in Electromagnetism

asked Jun 20, 2014 at 12:18

13 votes

1 answer

1k views

Causality for the Dirac Field

asked Dec 8, 2013 at 15:17

11 votes

2 answers

8k views

Can one show that ${\gamma^5}^\dagger = \gamma^5$ directly from the anticommutation relations?

asked Dec 1, 2013 at 11:57

11 votes

2 answers

3k views

Faddeev-Popov Ghosts

asked Aug 10, 2014 at 19:08

10 votes

2 answers

464 views

Inverting the equation for $T_{\mu\nu}$ in terms of $F_{\mu\nu}$

asked Jun 12, 2014 at 16:16

9 votes

1 answer

1k views

Peskin & Schroeder Chapter 3.1 EoM Lorentz Invariant under Lorentz Invariant Lagrangian

asked Nov 18, 2013 at 21:42

9 votes

1 answer

2k views

Noether Current when the Lagrangian depends on second derivative of the fields

asked Jul 4, 2014 at 13:23

9 votes

2 answers

3k views

Functional Derivative in the Linear Sigma Model

asked Jul 7, 2014 at 8:23

8 votes

4 answers

6k views

Proof of Connected Diagrams

asked Aug 1, 2014 at 16:38

8 votes

2 answers

2k views

Peskin and Schroeder Equation 3.23

asked Nov 23, 2013 at 11:46

8 votes

1 answer

2k views

Gamma Matrices in Dimensional Regularization

asked Mar 4, 2014 at 19:20

8 votes

1 answer

2k views

Peskin and Schroeder "Particle Creation by a Classical Source"

asked Nov 10, 2013 at 11:42

8 votes

2 answers

1k views

Non-stationary spacetime

asked Jun 12, 2014 at 8:34

8 votes

1 answer

821 views

Equation $7.22$ in Peskin & Schroeder: writing the Fourier transform of a two-point function as a series of 1PI diagrams

asked Jan 30, 2014 at 15:12

8 votes

3 answers

318 views

How to think about magnetic wells?

asked Aug 30, 2023 at 4:56

7 votes

1 answer

1k views

From Minkowski to Euclidean Time in Path Integrals

asked Mar 30, 2014 at 15:47

7 votes

0 answers

1k views

Energy-Momentum Tensor of a Gravitational Wave

asked Jun 7, 2014 at 16:04

7 votes

1 answer

1k views

Gupta-Bleuler Formalism

asked Jan 14, 2014 at 6:49

7 votes

1 answer

1k views

Normalization of the real Klein Gordon Field in Peskin and Schroeder chapter 2

asked Oct 27, 2013 at 14:44

7 votes

2 answers

2k views

Photon Mass Term in Schwinger's 2D QED Model

asked Jul 6, 2014 at 13:31

6 votes

1 answer

657 views

Transformation Law for Covariant Derivative in $SU(2)$ Yang-Mills

asked May 1, 2014 at 11:28

6 votes

0 answers

281 views

Complete localization in 2D

asked Sep 11, 2020 at 1:46

5 votes

1 answer

492 views

Why is the Yang-Mills Comparator unitary?

asked May 1, 2014 at 9:21

5 votes

2 answers

452 views

Wick rotation with magnetic fields

asked Nov 12, 2020 at 23:49

4 votes

1 answer

255 views

The argument for a mass gap for the $O(3)$ Heisenberg ferromagnet

asked Feb 9, 2021 at 16:36

4 votes

0 answers

3k views

Compute $Z_2$ Invariant of 2D Topological Insulators without Computing the Eigenstates

asked Feb 28, 2015 at 20:09

4 votes

1 answer

378 views

Yang-Mills Lagrangian invariant under BRST

asked Jul 1, 2014 at 16:35

Stack Exchange Network

74 Questions

Energy-Momentum Tensor in QFT vs. GR

Software for calculating Feynman Diagrams

Yang-Mills CP violation

Faddeev-Popov Gauge-Fixing in Electromagnetism

Causality for the Dirac Field

Can one show that ${\gamma^5}^\dagger = \gamma^5$ directly from the anticommutation relations?

Faddeev-Popov Ghosts

Inverting the equation for $T_{\mu\nu}$ in terms of $F_{\mu\nu}$

Peskin & Schroeder Chapter 3.1 EoM Lorentz Invariant under Lorentz Invariant Lagrangian

Noether Current when the Lagrangian depends on second derivative of the fields

Functional Derivative in the Linear Sigma Model

Proof of Connected Diagrams

Peskin and Schroeder Equation 3.23

Gamma Matrices in Dimensional Regularization

Peskin and Schroeder "Particle Creation by a Classical Source"

Non-stationary spacetime

Equation $7.22$ in Peskin & Schroeder: writing the Fourier transform of a two-point function as a series of 1PI diagrams

How to think about magnetic wells?

From Minkowski to Euclidean Time in Path Integrals

Energy-Momentum Tensor of a Gravitational Wave

Gupta-Bleuler Formalism

Normalization of the real Klein Gordon Field in Peskin and Schroeder chapter 2

Photon Mass Term in Schwinger's 2D QED Model

Transformation Law for Covariant Derivative in $SU(2)$ Yang-Mills

Complete localization in 2D

Why is the Yang-Mills Comparator unitary?

Wick rotation with magnetic fields

The argument for a mass gap for the $O(3)$ Heisenberg ferromagnet

Compute $Z_2$ Invariant of 2D Topological Insulators without Computing the Eigenstates

Yang-Mills Lagrangian invariant under BRST