User John

20 votes

2 answers

4k views

What is "Dynamical phase transition"?

asked Mar 24, 2016 at 8:46

16 votes

5 answers

9k views

How radioactive is uranium?

biophysics radioactivity medical-physics

asked Aug 8, 2016 at 8:23

7 votes

2 answers

629 views

What is the difference between Einstein–Brillouin–Keller (EBK) quantization and Bohr-Sommerfeld quantization?

quantum-mechanics terminology quantization semiclassical

asked Dec 17, 2016 at 13:24

6 votes

1 answer

259 views

How to solve the 10000th eigenvalue of the anharmonic oscillator?

quantum-mechanics mathematical-physics approximations anharmonic-oscillators

asked Dec 18, 2016 at 5:50

4 votes

3 answers

1k views

Why can the Clebsch-Gordan coefficients always be chosen real?

quantum-mechanics angular-momentum group-theory group-representations representation-theory

asked Aug 29, 2016 at 2:46

4 votes

1 answer

211 views

What will a glass look like in 500 years?

thermodynamics statistical-mechanics condensed-matter glass

asked Dec 31, 2015 at 5:55

4 votes

0 answers

34 views

Why is the energy of a vortex in a superconductor finite?

energy superconductivity singularities critical-phenomena vortex

asked May 5 at 7:14

3 votes

1 answer

64 views

Turning into superconductivity---continuous or discontinuous?

condensed-matter superconductivity

asked May 28, 2019 at 13:17

3 votes

2 answers

249 views

Completeness condition involving continuum states

quantum-mechanics operators hilbert-space mathematical-physics hamiltonian

asked Jun 28, 2019 at 13:12

3 votes

1 answer

78 views

Symmetry of the hamiltonian $H = \frac{1}{2m}p^2 + V(r) + a \, \vec{s} \cdot \vec{l} $

homework-and-exercises atomic-physics symmetry group-theory hamiltonian

asked Aug 13, 2019 at 8:22

2 votes

1 answer

149 views

Is there really no transverse sound wave in air? [duplicate]

classical-mechanics waves acoustics

asked Jan 9, 2016 at 12:53

2 votes

1 answer

29 views

Confusion about the action variable definition

classical-mechanics coordinate-systems hamiltonian-formalism phase-space integrable-systems

asked May 13 at 22:41

2 votes

1 answer

143 views

Degeneracy of $\left|\pm k\right\rangle $: because of reflection symmetry or time reversal symmetry?

quantum-mechanics symmetry

asked Nov 8, 2016 at 12:30

2 votes

0 answers

51 views

Different solutions of the harmonic oscillator

quantum-mechanics harmonic-oscillator

asked Mar 29 at 13:14

1 vote

0 answers

29 views

Question about the so-called upper critical dimension

statistical-mechanics critical-phenomena mean-field-theory

asked Mar 22 at 0:07

1 vote

2 answers

173 views

Why is the sound channel in the ocean especially good for low frequency sound?

waves acoustics geophysics

asked Jan 17, 2016 at 1:30

1 vote

0 answers

158 views

Is there sound diffraction grating? [closed]

optics waves acoustics interference diffraction

asked Jan 6, 2016 at 7:51

1 vote

1 answer

464 views

Why is the electric component of a light field more important than the magnetic component? [duplicate]

electromagnetism optics

asked Dec 18, 2015 at 8:51

1 vote

2 answers

1k views

Can we determine the surface temperature of stars other than the Sun by using black body radiation theory?

temperature thermal-radiation spectroscopy stars

asked Feb 11, 2016 at 2:28

1 vote

1 answer

247 views

Question about the Luttinger liquid

condensed-matter solid-state-physics

asked Jun 1, 2016 at 12:56

1 vote

1 answer

166 views

Field theory on a lattice, what is this?

field-theory lattice-model

asked Mar 1, 2016 at 2:31

1 vote

1 answer

98 views

Why do the KAM tori divide the phase space into disjoint parts in $d\leq 2$ systems?

classical-mechanics topology chaos-theory complex-systems

asked Sep 10, 2016 at 9:23

1 vote

1 answer

106 views

A derivation problem about the Lewis-Riesenfeld theory

quantum-mechanics mathematical-physics time-evolution

asked Sep 12, 2016 at 9:37

1 vote

0 answers

55 views

periodic orbits in Gutzwiller's trace formula

mathematical-physics semiclassical

asked May 20, 2018 at 3:59

1 vote

0 answers

246 views

Normalizable eigenvectors of the inverted harmonic oscillator

quantum-mechanics mathematical-physics hamiltonian

asked Jul 20, 2016 at 9:36

0 votes

2 answers

138 views

Derivation of a commutator in the Luttinger liquid theory

condensed-matter strong-correlated

asked Jul 8, 2016 at 3:21

0 votes

1 answer

138 views

Example of integrable time-dependent one degree-of-freedom Hamiltonian system?

classical-mechanics hamiltonian-formalism chaos-theory integrable-systems complex-systems

asked Sep 10, 2016 at 3:15

0 votes

0 answers

261 views

About the current-current correlator

condensed-matter solid-state-physics

asked Dec 19, 2016 at 14:56

0 votes

0 answers

102 views

Wannier's solution of the Landau-Zener problem

quantum-mechanics mathematical-physics specific-reference

asked Jan 17, 2017 at 12:11

0 votes

3 answers

100 views

Sign of $(\partial T /\partial V )_E$

thermodynamics energy temperature gas volume

asked May 12, 2019 at 8:24

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41 Questions

What is "Dynamical phase transition"?

How radioactive is uranium?

What is the difference between Einstein–Brillouin–Keller (EBK) quantization and Bohr-Sommerfeld quantization?

How to solve the 10000th eigenvalue of the anharmonic oscillator?

Why can the Clebsch-Gordan coefficients always be chosen real?

What will a glass look like in 500 years?

Why is the energy of a vortex in a superconductor finite?

Turning into superconductivity---continuous or discontinuous?

Completeness condition involving continuum states

Symmetry of the hamiltonian $H = \frac{1}{2m}p^2 + V(r) + a \, \vec{s} \cdot \vec{l} $

Is there really no transverse sound wave in air? [duplicate]

Confusion about the action variable definition

Degeneracy of $\left|\pm k\right\rangle $: because of reflection symmetry or time reversal symmetry?

Different solutions of the harmonic oscillator

Question about the so-called upper critical dimension

Why is the sound channel in the ocean especially good for low frequency sound?

Is there sound diffraction grating? [closed]

Why is the electric component of a light field more important than the magnetic component? [duplicate]

Can we determine the surface temperature of stars other than the Sun by using black body radiation theory?

Question about the Luttinger liquid

Field theory on a lattice, what is this?

Why do the KAM tori divide the phase space into disjoint parts in $d\leq 2$ systems?

A derivation problem about the Lewis-Riesenfeld theory

periodic orbits in Gutzwiller's trace formula

Normalizable eigenvectors of the inverted harmonic oscillator

Derivation of a commutator in the Luttinger liquid theory

Example of integrable time-dependent one degree-of-freedom Hamiltonian system?

About the current-current correlator

Wannier's solution of the Landau-Zener problem

Sign of $(\partial T /\partial V )_E$