User Tobias Kienzler

52

87

votes

10

answers

12k

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Is there something similar to Noether's theorem for discrete symmetries?

Oct 1 at 23:35 Geremia 1,928

31

49

votes

9

answers

6k

views

Is a “third quantization” possible?

quantum-field-theory quantization second-quantization

Mar 18 '15 at 13:19 Community♦ 1

13

41

votes

17

answers

5k

views

Why does one experience a short pull in the wrong direction when a vehicle stops?

newtonian-mechanics jerk

Jul 28 '16 at 15:15 Community♦ 1

12

34

votes

4

answers

2k

views

Is the world $C^\infty$?

quantum-field-theory analyticity

Apr 23 '11 at 19:40 Community♦ 1

8

19

votes

1

answer

4k

views

What is the definition of how to count degrees of freedom?

definition degrees-of-freedom

Mar 30 at 18:49 Qmechanic♦ 127k

2

19

votes

2

answers

334

views

Can symmetry generators be used for quantization?

quantum-field-theory mathematical-physics symmetry group-theory quantization

Jan 3 '13 at 12:27 Dilaton 8,639

17

19

votes

4

answers

3k

views

If all conserved quantities of a system are known, can they be explained by symmetries?

mathematical-physics symmetry noethers-theorem conservation-laws integrals-of-motion

Apr 28 '11 at 21:06 Community♦ 1

2

14

votes

3

answers

707

views

Are there models/simulations of antigravitational antimatter-galaxies?

gravity simulations antimatter galaxies models

Jan 26 '16 at 0:34 Community♦ 1

4

13

votes

2

answers

527

views

What colour is an electron?

electromagnetic-radiation quantum-electrodynamics non-linear-optics

Mar 1 '19 at 3:14 KF Gauss 3,802

1

13

votes

2

answers

1k

views

Is a neutron star basically an isotope?

neutrons neutron-stars isotopes

Sep 13 '15 at 20:12 pathintegral 1,155

3

7

votes

1

answer

928

views

Imaginary time is to inverse temperature what imaginary entropy is to …?

time temperature entropy complex-numbers wick-rotation

Oct 26 '14 at 1:42 Nathaniel 29.6k

1

7

votes

2

answers

534

views

Why does $\mathcal L = -\frac14 F^{\mu\nu} F_{\mu\nu}$ imply Photons are massless?

particle-physics photons group-theory group-representations

Jul 31 '14 at 18:50 Tobias Kienzler 5,717

3

6

votes

1

answer

640

views

How to correctly calculate the colour of the sky?

optics electromagnetic-radiation scattering atmospheric-science sun

May 12 '19 at 17:02 Community♦ 1

1

6

votes

2

answers

337

views

Is Quantum Coulomb still singular?

quantum-mechanics electromagnetism charge singularities coulombs-law

Sep 10 '15 at 8:28 Tobias Kienzler 5,717

4

votes

2

answers

5k

views

How to measure Entropy?

entropy measurements

May 20 '15 at 13:32 Kyle Kanos 23.1k

4

votes

1

answer

99

views

A nice overview (and maybe derivation) of the Poincaré transformations of the Vector Spherical Harmonics

research-level specific-reference group-representations poincare-symmetry spherical-harmonics

Jan 27 '13 at 16:00 Dilaton 8,639

3

votes

1

answer

854

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Is the Gibbs-Duhem equation always valid?

thermodynamics potential

Mar 22 '15 at 20:24 Community♦ 1

0

votes

1

answer

73

views

How linearly additive are the x-ray mass attenuation coefficients for molecules?

absorption x-rays attenuation

Aug 5 '18 at 9:34 imabug 483

0

votes

2

answers

173

views

Does time pass fastest in isolated, resting space?

general-relativity time vacuum

Feb 21 '17 at 5:52 Anixx 9,070

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19 Questions

Is there something similar to Noether's theorem for discrete symmetries?

Is a “third quantization” possible?

Why does one experience a short pull in the wrong direction when a vehicle stops?

Is the world $C^\infty$?

What is the definition of how to count degrees of freedom?

Can symmetry generators be used for quantization?

If all conserved quantities of a system are known, can they be explained by symmetries?

Are there models/simulations of antigravitational antimatter-galaxies?

What colour is an electron?

Is a neutron star basically an isotope?

Imaginary time is to inverse temperature what imaginary entropy is to …?

Why does $\mathcal L = -\frac14 F^{\mu\nu} F_{\mu\nu}$ imply Photons are massless?

How to correctly calculate the colour of the sky?

Is Quantum Coulomb still singular?

How to measure Entropy?

A nice overview (and maybe derivation) of the Poincaré transformations of the Vector Spherical Harmonics

Is the Gibbs-Duhem equation always valid?

How linearly additive are the x-ray mass attenuation coefficients for molecules?

Does time pass fastest in isolated, resting space?