User Blazej

21 votes

2 answers

8k views

When is stress-energy tensor defined as variation of action with respect to metric conserved?

asked May 17, 2016 at 16:50

14 votes

1 answer

900 views

Do the interaction picture fields transform as free fields under boosts?

asked Aug 23, 2016 at 21:10

13 votes

2 answers

638 views

Why can we approximate massive particles as massless or vice versa?

asked Jul 26, 2016 at 20:34

11 votes

1 answer

675 views

Why do we solve the Wess-Zumino consistency condition using the method of descent?

asked Apr 26, 2020 at 15:15

11 votes

1 answer

592 views

When is numerical value of Lagrangian evaluated on-shell a full differential?

asked May 7, 2016 at 10:04

9 votes

2 answers

542 views

Renormalization and canonical commutation relations

asked Jul 24, 2017 at 11:24

8 votes

1 answer

2k views

Derivation of Gell-Mann Okubo relation for mesons

asked Jun 12, 2016 at 19:44

7 votes

1 answer

1k views

Significance of symplectic form in classical field theory

asked Jun 27, 2016 at 15:43

7 votes

1 answer

398 views

Feynman diagram representation of variational derivative of S-matrix

asked Sep 15, 2016 at 22:26

6 votes

1 answer

341 views

Generalized coherent states in arbitrary potential

asked Oct 15, 2016 at 9:41

6 votes

1 answer

908 views

(Anti)commutation of ghosts and fermions

asked Dec 23, 2017 at 16:30

6 votes

1 answer

480 views

Canonical formalism in light-cone coordinates

asked Apr 26, 2017 at 17:39

5 votes

2 answers

645 views

Rigorous definition of density of states for continuous spectrum

asked May 24, 2016 at 14:26

4 votes

0 answers

215 views

Where do the intrinsic parities of particles come from?

asked Jun 12, 2016 at 11:42

4 votes

1 answer

244 views

Normalization of the Chern-Simons action in the Dijkgraaf-Witten paper

asked Apr 2, 2020 at 15:34

4 votes

0 answers

209 views

What is the topology of phase space of $n$ free relativistic particles in center of mass frame?

asked Jul 31, 2016 at 22:21

3 votes

0 answers

65 views

How to systematically check whether given Yang-Mills field has some symmetry?

asked Jan 17, 2017 at 15:45

3 votes

1 answer

304 views

Extensiveness of entropy in classical microcanonical ensemble

asked Apr 30, 2016 at 8:18

3 votes

1 answer

93 views

Symmetry responsible for equality of masses of particles

asked Apr 8, 2016 at 20:29

2 votes

1 answer

213 views

Schrodinger equation contains two pieces of information?

asked Aug 9, 2015 at 22:06

2 votes

1 answer

262 views

Conceptual problem with action considered as function of endpoints

asked Jan 15, 2016 at 20:03

2 votes

1 answer

51 views

Is it possible that propagation of acustic waves leads to emission of radiation?

asked May 29, 2016 at 11:17

2 votes

1 answer

485 views

Problem with figuring out sign conventions in QFT

asked Jul 21, 2016 at 20:40

2 votes

1 answer

219 views

Relation of evaluation point in path integral with ordering ambiguties. Example with particle in gauge field

asked Nov 11, 2016 at 17:02

2 votes

1 answer

1k views

How to treat charge conjugation and time reversal operators for Dirac Field in representation invariant way?

asked Aug 10, 2016 at 22:32

2 votes

1 answer

542 views

Identifying the flavour singlet baryon

asked Nov 17, 2017 at 22:39

1 vote

0 answers

187 views

Is it necessary that spin $0$ particles have intrinsic parity $\pm 1$?

asked Aug 10, 2016 at 17:34

1 vote

1 answer

100 views

Interpretation of black hole area

asked Aug 6, 2015 at 15:47

1 vote

1 answer

3k views

Calculation of internal energy and entropy of ideal gas

asked Apr 13, 2016 at 20:04

0 votes

0 answers

84 views

Is there a relation between various vertices in Yang-Mills theory?

asked Feb 7, 2018 at 11:30

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31 Questions

When is stress-energy tensor defined as variation of action with respect to metric conserved?

Do the interaction picture fields transform as free fields under boosts?

Why can we approximate massive particles as massless or vice versa?

Why do we solve the Wess-Zumino consistency condition using the method of descent?

When is numerical value of Lagrangian evaluated on-shell a full differential?

Renormalization and canonical commutation relations

Derivation of Gell-Mann Okubo relation for mesons

Significance of symplectic form in classical field theory

Feynman diagram representation of variational derivative of S-matrix

Generalized coherent states in arbitrary potential

(Anti)commutation of ghosts and fermions

Canonical formalism in light-cone coordinates

Rigorous definition of density of states for continuous spectrum

Where do the intrinsic parities of particles come from?

Normalization of the Chern-Simons action in the Dijkgraaf-Witten paper

What is the topology of phase space of $n$ free relativistic particles in center of mass frame?

How to systematically check whether given Yang-Mills field has some symmetry?

Extensiveness of entropy in classical microcanonical ensemble

Symmetry responsible for equality of masses of particles

Schrodinger equation contains two pieces of information?

Conceptual problem with action considered as function of endpoints

Is it possible that propagation of acustic waves leads to emission of radiation?

Problem with figuring out sign conventions in QFT

Relation of evaluation point in path integral with ordering ambiguties. Example with particle in gauge field

How to treat charge conjugation and time reversal operators for Dirac Field in representation invariant way?

Identifying the flavour singlet baryon

Is it necessary that spin $0$ particles have intrinsic parity $\pm 1$?

Interpretation of black hole area

Calculation of internal energy and entropy of ideal gas

Is there a relation between various vertices in Yang-Mills theory?