User Qmechanic - Physics Stack Exchange

bio	website	arXiv.org
	location	Europe
	age	47
visits	member for	2 years, 2 months
	seen	18 mins ago
stats	profile views	4,472

	17,182 reputation	bio	website	arXiv.org	visits	member for	2 years, 2 months
41648 badges		location	Europe		seen	18 mins ago

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21

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Why is this not a realisable operation on a quantum system?

54m ago wemblem 21

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5

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0

answers

60

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Symmetry of the stress tensor

continuum-mechanics stress-energy-tensor

23h ago R S 195

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35

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Some questions about the edge states for time-reversal invariant topological superconductors?

condensed-matter symmetry superconductivity topological-insulators electronic-band-theory

1d ago K-boy 380

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0

answers

23

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Explain the Föppl–von Kármán equations

elasticity continuum-mechanics non-linear-dynamics

2d ago Qmechanic♦ 17.2k

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13

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2

answers

148

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Is every quantum measurement reducible to measurements of position and time?

quantum-mechanics quantum-interpretations measurement-problem path-integral observables

2d ago SMeznaric 491

2

votes

0

answers

90

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Quantum field theory alternatives

quantum-field-theory

may 16 at 21:40 Stefan Bischof 558

1

vote

1

answer

52

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Topological vs. non-topological noetherian charges

symmetry charge noethers-theorem topology discrete

may 15 at 22:36 Qmechanic♦ 17.2k

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0

answers

119

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Is there a “covariant derivative” for conformal transformation?

conformal-field-theory

may 16 at 19:52 Learning is a mess 352

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vote

2

answers

40

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Base quantities and charges

units color-charge

may 14 at 16:52 Emilio Pisanty 7,130

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2

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0

answers

40

views

What is the minimum non-integer dimension for which the XY model shows a phase transition? (if well-defined)

statistical-mechanics

may 14 at 12:44 Ikiperu 91

1

vote

1

answer

62

views

Why doesn't one-photon-irreducible function have any pole at $q^2=0$?

quantum-field-theory

may 14 at 8:18 Luboš Motl 67.7k

2

5

votes

0

answers

65

views

Why is there no UV catastrophe (divergence) in turbulence?

fluid-dynamics turbulence

may 13 at 21:08 Dilaton 2,461

1

4

votes

2

answers

84

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What would happen if energy was conserved but phase space volume wasn't? (and vice-versa)

statistical-mechanics energy-conservation hamiltonian-formalism phase-space

may 14 at 22:44 Jan Lalinsky 21

1

2

votes

3

answers

86

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Spherical inversion in terms of special conformal transformation

conformal-field-theory

may 14 at 11:12 Peter Kravchuk 831

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3

votes

1

answer

87

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A corollary of Mermin-Wagner Theorem

condensed-matter

may 14 at 10:04 Norbert Schuch 717

1

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0

answers

49

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Mass spectrum of Type I string theory

string-theory supersymmetry

may 13 at 16:11 dimension10 140

1

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0

answers

65

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Fermi level for the bulk of topological insulator

condensed-matter

may 15 at 6:11 hlew 328

2

3

votes

3

answers

113

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Physical interpretation of Poisson bracket properties

classical-mechanics hamiltonian-formalism poisson-brackets

may 13 at 14:43 Ikiperu 91

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3

votes

1

answer

37

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Parametrization of $U(N)$ non-linear sigma model

quantum-field-theory particle-physics sigma-models

may 13 at 9:35 David Bar Moshe 7,667

2

votes

0

answers

43

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Mathematical equivalence between Liénard-Wiechert potential and 4-potential in Rindler coordinates

electromagnetic-radiation lienard-wiechert

may 13 at 0:58 Emilio Pisanty 7,130

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3

votes

2

answers

110

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How to prove that the generator of proper vertices is the Legendre transform of $W(j) = \log \frac{Z[j]}{Z[0]}$

quantum-field-theory

may 13 at 5:05 Ikiperu 91

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3

votes

1

answer

62

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Spectra of the Type II String theories

quantum-field-theory string-theory supersymmetry

may 12 at 11:59 Olof 693

3

9

votes

1

answer

259

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How do I find constraints on the Nambu-Goto Action?

string-theory constrained-dynamics string

may 14 at 20:57 Jonathan Gleason 1,306

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2

answers

53

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Electron in an infinite potential well

quantum-mechanics homework wavefunction schrodinger-equation potential

may 11 at 16:52 firtree 618

3

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0

answers

50

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Bohr-sommerfeld quatnization from the WKB approximation

quantization

may 11 at 12:06 Jose Javier Garcia 1,142

2

votes

0

answers

39

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Construction of the supergravity side explicitly in gauge/gravity dualities

string-theory ads-cft supergravity

may 11 at 8:21 Debangshu 165

1

vote

3

answers

106

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Complex energy eigenstates of the harmonic oscillator

quantum-mechanics harmonic-oscillator special-functions

may 16 at 14:08 Jan Lalinsky 11

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1

vote

1

answer

67

views

Ginzburg-Landau model for superconductivity

electromagnetism temperature superconductivity

may 10 at 1:12 Felipe Attanasio 19

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vote

2

answers

109

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Doubts concerning Wigner's classification

special-relativity spin polarization representation-theory helicity

may 11 at 21:13 Peter Kravchuk 831

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6

votes

1

answer

78

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Critical dimension in quantization of p-branes

string-theory dimensions quantization anomaly branes

may 9 at 16:37 Siva 1,476

Qmechanic

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