User aitfel

7 votes

1 answer

1k views

Measure of Feynman path integral

asked Jun 12, 2020 at 18:54

6 votes

1 answer

136 views

Does Goldstone theorem have anything to do with Cosmic string

asked Jul 5, 2020 at 19:38

6 votes

2 answers

1k views

Getting Feynman propagator using path integral

asked Mar 20, 2020 at 6:36

6 votes

0 answers

257 views

Geometric description of canonical commutation relation

asked Mar 20, 2020 at 17:57

6 votes

1 answer

699 views

Why do we have residual symmetry when we already used all symmetry in gauge fixing of the worldsheet metric?

asked Apr 19, 2021 at 16:44

5 votes

2 answers

319 views

Particle statistics and interference pattern

asked Sep 13, 2021 at 7:33

5 votes

1 answer

641 views

Fourier transform in Hawking's paper

asked Sep 2, 2019 at 15:05

5 votes

0 answers

127 views

Break down of time independent perturbation formula of quantum mechanics in quantum field theory

asked Sep 19, 2018 at 15:53

5 votes

1 answer

209 views

How did Heisenberg come up with CCR?

asked Apr 1, 2020 at 7:06

5 votes

1 answer

582 views

What's a minisuperspace in quantum cosmology?

asked Nov 17, 2020 at 4:42

4 votes

0 answers

143 views

Solving scalar quantum field in 1+1D Milne space

asked Jan 16, 2020 at 14:15

4 votes

1 answer

140 views

Can QFT be constructed without using vacuum?

asked Dec 2, 2019 at 10:32

4 votes

0 answers

153 views

Renormalization in non-perturbative QFT ($n$-point function)

asked Dec 29, 2020 at 19:51

4 votes

0 answers

82 views

Error of $-i$ factor in light cone indices in conformal field theory in Becker's book

asked Apr 19, 2021 at 19:46

3 votes

1 answer

96 views

Usage of Lagrangian not Lagrangian density for quantum string in Polchinski

asked Apr 29, 2021 at 17:41

3 votes

1 answer

116 views

Scaling dimension/weight of $\partial^{\mu}$

asked May 11, 2021 at 9:27

3 votes

1 answer

83 views

Why doesn't a Planck type derivation work for Hawking radiation?

asked Dec 19, 2020 at 15:05

3 votes

0 answers

605 views

Do bubble/vacuum diagrams have some physical implication?

asked Oct 20, 2020 at 17:19

3 votes

0 answers

68 views

How is magnetic flux viewed in QED?

asked Mar 25, 2020 at 8:27

2 votes

1 answer

325 views

Second-order perturbation and photon creation

asked Sep 17, 2018 at 17:26

2 votes

0 answers

248 views

Causal past of future null-like infinity for a black hole

asked Jun 5, 2020 at 7:15

2 votes

1 answer

179 views

Why does annihilation and creation operator mix in curved spacetime?

asked Jun 17, 2020 at 17:35

2 votes

1 answer

497 views

Are the paths in a Feynman path integral not observable?

asked Sep 28, 2020 at 5:30

2 votes

1 answer

94 views

Are following statements valid for quantum gravity?

asked Jul 20, 2020 at 18:04

2 votes

1 answer

159 views

Seiberg-Witten Gauge theory

asked Nov 15, 2020 at 14:15

2 votes

1 answer

867 views

Does $L\cdot S$ commute with $J^2$?

asked Nov 29, 2020 at 17:10

2 votes

0 answers

182 views

Tunneling in quantum field theory

asked Dec 2, 2020 at 14:22

2 votes

1 answer

162 views

Ways to derive black-body radiation in Unruh effect

asked Jan 10, 2020 at 18:16

2 votes

1 answer

105 views

Probability of a particle to go from one position to another

asked Sep 28, 2018 at 15:50

2 votes

0 answers

124 views

Hierarchy problem and loop quantum gravity

asked Oct 29, 2018 at 13:54

Stack Exchange Network

108 Questions

Measure of Feynman path integral

Does Goldstone theorem have anything to do with Cosmic string

Getting Feynman propagator using path integral

Geometric description of canonical commutation relation

Why do we have residual symmetry when we already used all symmetry in gauge fixing of the worldsheet metric?

Particle statistics and interference pattern

Fourier transform in Hawking's paper

Break down of time independent perturbation formula of quantum mechanics in quantum field theory

How did Heisenberg come up with CCR?

What's a minisuperspace in quantum cosmology?

Solving scalar quantum field in 1+1D Milne space

Can QFT be constructed without using vacuum?

Renormalization in non-perturbative QFT ($n$-point function)

Error of $-i$ factor in light cone indices in conformal field theory in Becker's book

Usage of Lagrangian not Lagrangian density for quantum string in Polchinski

Scaling dimension/weight of $\partial^{\mu}$

Why doesn't a Planck type derivation work for Hawking radiation?

Do bubble/vacuum diagrams have some physical implication?

How is magnetic flux viewed in QED?

Second-order perturbation and photon creation

Causal past of future null-like infinity for a black hole

Why does annihilation and creation operator mix in curved spacetime?

Are the paths in a Feynman path integral not observable?

Are following statements valid for quantum gravity?

Seiberg-Witten Gauge theory

Does $L\cdot S$ commute with $J^2$?

Tunneling in quantum field theory

Ways to derive black-body radiation in Unruh effect

Probability of a particle to go from one position to another

Hierarchy problem and loop quantum gravity