User aitfel

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Deriving the wave equation for electromagnetic waves

answered Mar 22, 2020 at 6:27

4 votes

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Why does homogeneity imply $d P^{\mu} / dX^{i} = 0$ along geodesic?

answered Oct 2, 2020 at 14:07

3 votes

Why isn't $g^{\mu \nu}\partial_{\nu}$ equal to $\partial^{\mu}$ in General Relativity?

answered Oct 6, 2020 at 11:29

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Could a proton be produced using the dynamical Casimir effect?

answered Sep 5, 2020 at 13:09

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Matching Metrics of Gravitational Collapse in Weinberg's Gravitation and Cosmology

answered Sep 5, 2020 at 16:12

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What would happen to the Earth, if the moon was a black hole?

answered Oct 13, 2018 at 19:38

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Alternative formula for the affine connection in a new coordinate basis

answered Sep 29, 2020 at 16:05

2 votes

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Dielectric Problem Boundary Condition

answered Sep 8, 2020 at 16:39

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Integral of a loop that doesn't encircle a current

answered Jun 26, 2020 at 6:23

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Heat kernel: DeWitt iterative procedure

answered Oct 7, 2020 at 17:06

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How do I project on the Dirac and Pauli structures?

answered Dec 30, 2021 at 15:10

1 vote

Notations and Variations in the proof for Noether's theorem for fields

answered May 19, 2021 at 17:47

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Definition of normal 4-vector of hypersurface in Poisson

answered Aug 23, 2021 at 7:39

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Equal-time 2-point correlator and divergent (?) integral

answered Nov 17, 2021 at 4:05

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Question on the proof of Hawking radiation as done in "Quantum fields in curved space - Birrell,Davies"

answered Feb 11, 2022 at 13:29

1 vote

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How to evaluate traces of Dirac matrices with slashed momentum in between?

answered Oct 8, 2020 at 15:25

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Confusion on wave packet and creation operator in Mark Srednicki's book

answered Oct 24, 2020 at 11:08

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Identical Particles in Quantum Field Theory

answered Oct 26, 2020 at 10:57

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What does it mean to generate the full algebra of $SU(2)$ by commutation?

answered Oct 29, 2020 at 12:47

1 vote

The integrals in the paper (Hawking radiation as tunneling)

answered Dec 27, 2020 at 7:38

1 vote

Does the Landau-Lifshitz pseudotensor contain all non-linear terms in $h_{\mu\nu}$?

answered Jul 2, 2020 at 19:54

1 vote

Can photon be said to warp time only and not space? Can SR be modelled like GR, considering warping of temporal dimension only?

answered Jul 3, 2020 at 9:01

1 vote

Can Hawking radiation be observed from the radiation (spectrum) of M87*?

answered Sep 2, 2020 at 17:43

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Magnetic flux linked between two coils placed co-axially

answered Sep 3, 2020 at 6:57

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How does the orbiting of electrons around nuclei START?

answered Apr 4, 2018 at 15:02

1 vote

Is current due to a point charge moving in a circle ill-defined?

answered Sep 10, 2020 at 16:54

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The Negative Energy in the Harmonic Oscillator Potential!

answered Sep 16, 2020 at 13:51

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Absolute value of Jacobian when converting tensor density

answered Sep 18, 2020 at 15:45

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Time-varying magnetic field and classical electrodynamics

answered Sep 27, 2020 at 19:08

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4-momentum conservation vertex-by-vertex in diagrams -- reference with explicit statement

answered Sep 7, 2020 at 15:51

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37 Answers

Deriving the wave equation for electromagnetic waves

Why does homogeneity imply $d P^{\mu} / dX^{i} = 0$ along geodesic?

Why isn't $g^{\mu \nu}\partial_{\nu}$ equal to $\partial^{\mu}$ in General Relativity?

Could a proton be produced using the dynamical Casimir effect?

Matching Metrics of Gravitational Collapse in Weinberg's Gravitation and Cosmology

What would happen to the Earth, if the moon was a black hole?

Alternative formula for the affine connection in a new coordinate basis

Dielectric Problem Boundary Condition

Integral of a loop that doesn't encircle a current

Heat kernel: DeWitt iterative procedure

How do I project on the Dirac and Pauli structures?

Notations and Variations in the proof for Noether's theorem for fields

Definition of normal 4-vector of hypersurface in Poisson

Equal-time 2-point correlator and divergent (?) integral

Question on the proof of Hawking radiation as done in "Quantum fields in curved space - Birrell,Davies"

How to evaluate traces of Dirac matrices with slashed momentum in between?

Confusion on wave packet and creation operator in Mark Srednicki's book

Identical Particles in Quantum Field Theory

What does it mean to generate the full algebra of $SU(2)$ by commutation?

The integrals in the paper (Hawking radiation as tunneling)

Does the Landau-Lifshitz pseudotensor contain all non-linear terms in $h_{\mu\nu}$?

Can photon be said to warp time only and not space? Can SR be modelled like GR, considering warping of temporal dimension only?

Can Hawking radiation be observed from the radiation (spectrum) of M87*?

Magnetic flux linked between two coils placed co-axially

How does the orbiting of electrons around nuclei START?

Is current due to a point charge moving in a circle ill-defined?

The Negative Energy in the Harmonic Oscillator Potential!

Absolute value of Jacobian when converting tensor density

Time-varying magnetic field and classical electrodynamics

4-momentum conservation vertex-by-vertex in diagrams -- reference with explicit statement