User rainman

27 votes

3 answers

11k views

Weyl Ordering Rule

asked Mar 19, 2013 at 8:30

27 votes

1 answer

15k views

Lorentz Invariant Integration Measure [closed]

asked Nov 3, 2013 at 13:09

19 votes

4 answers

10k views

How to derive Maxwell's equations from the electromagnetic Lagrangian?

asked Jul 19, 2013 at 18:39

10 votes

1 answer

5k views

Generators of Poincare Groups

asked Feb 10, 2014 at 18:17

8 votes

2 answers

2k views

Number of the Generators of Poincare Group

asked Feb 22, 2014 at 8:11

8 votes

5 answers

2k views

$m$ in Klein-Gordon Equation

asked Jan 18, 2019 at 8:51

8 votes

4 answers

1k views

Hamiltonian Field Theory in Peskin & Schroeder

asked Sep 21, 2021 at 16:50

7 votes

2 answers

1k views

Rotation Group and Lorentz Group

asked Feb 17, 2014 at 18:42

7 votes

2 answers

2k views

Parallel Transport of a 4-vector

asked Sep 27, 2013 at 21:54

6 votes

1 answer

1k views

Reason behind canonical quantization in QFT?

asked Jul 8, 2013 at 18:36

6 votes

1 answer

2k views

$(1/2, 0)$ representation of the Lorentz Group $SO(1,3)$

asked Jul 21, 2016 at 16:03

5 votes

1 answer

1k views

Definition of Local Function

asked Feb 22, 2013 at 19:35

5 votes

3 answers

4k views

Square bracket notation for anti-symmetric part of a tensor

asked Sep 30, 2013 at 20:13

5 votes

1 answer

801 views

Quantization surface in QFT

asked Sep 17, 2013 at 22:26

5 votes

3 answers

619 views

Poincare Generators in terms of Position and Momentum

asked Jul 15, 2014 at 18:36

4 votes

1 answer

454 views

Confusion with Newton's Second Law : Position & Time Dependence of Force

asked Oct 2, 2014 at 11:08

4 votes

1 answer

238 views

Vacuum Structure of Schwinger Model

asked Feb 13, 2015 at 19:22

4 votes

2 answers

7k views

Light-cone coordinates

asked Sep 17, 2013 at 8:47

4 votes

3 answers

204 views

Reason for considering the positive root

asked Feb 24, 2013 at 17:10

4 votes

2 answers

1k views

Definition of Free field or Noninteracting field

asked Feb 26, 2013 at 9:24

4 votes

2 answers

2k views

Unitary spacetime translation operator

asked Jun 29, 2013 at 18:41

4 votes

1 answer

1k views

Most general Feynman diagram

asked Jun 10, 2013 at 15:43

4 votes

1 answer

390 views

Relation between symmetry factors

asked Jun 13, 2013 at 18:37

4 votes

1 answer

521 views

Pole of a free-particle propagator

asked Aug 25, 2017 at 3:55

4 votes

0 answers

480 views

Normalization of One-Particle States for Klein-Gordon Field Quantization

asked Nov 8, 2021 at 4:06

3 votes

1 answer

560 views

Generating Functional for Scalar Fields

asked Jul 29, 2017 at 19:09

3 votes

1 answer

2k views

Parity and the Dipole Operator for a Two-Level System

asked May 12, 2020 at 2:21

3 votes

1 answer

4k views

Formula for Symmetry Factor

asked Jun 15, 2013 at 10:45

3 votes

0 answers

715 views

Vacuum to vacuum transition amplitude [duplicate]

asked Apr 2, 2013 at 15:28

3 votes

1 answer

2k views

Transformation rule of a partial derivative

asked Oct 6, 2013 at 16:40

Stack Exchange Network

77 Questions

Weyl Ordering Rule

Lorentz Invariant Integration Measure [closed]

How to derive Maxwell's equations from the electromagnetic Lagrangian?

Generators of Poincare Groups

Number of the Generators of Poincare Group

$m$ in Klein-Gordon Equation

Hamiltonian Field Theory in Peskin & Schroeder

Rotation Group and Lorentz Group

Parallel Transport of a 4-vector

Reason behind canonical quantization in QFT?

$(1/2, 0)$ representation of the Lorentz Group $SO(1,3)$

Definition of Local Function

Square bracket notation for anti-symmetric part of a tensor

Quantization surface in QFT

Poincare Generators in terms of Position and Momentum

Confusion with Newton's Second Law : Position & Time Dependence of Force

Vacuum Structure of Schwinger Model

Light-cone coordinates

Reason for considering the positive root

Definition of Free field or Noninteracting field

Unitary spacetime translation operator

Most general Feynman diagram

Relation between symmetry factors

Pole of a free-particle propagator

Normalization of One-Particle States for Klein-Gordon Field Quantization

Generating Functional for Scalar Fields

Parity and the Dipole Operator for a Two-Level System

Formula for Symmetry Factor

Vacuum to vacuum transition amplitude [duplicate]

Transformation rule of a partial derivative