User Chaos

11 votes

2 answers

5k views

Why zero chemical potential does not allow the Bose-Einstein Condensation of Phonons?

asked May 22, 2017 at 19:18

7 votes

2 answers

4k views

$SU(3)$ irreducible representations with tensor method

asked Feb 28, 2015 at 23:39

6 votes

1 answer

596 views

Irrotational fluid

asked Jul 8, 2014 at 18:00

6 votes

1 answer

2k views

$SU(2)$ generators and creation annihilation operators

asked Feb 26, 2015 at 16:43

5 votes

1 answer

219 views

Clever way to show a property of Lie transformation

asked Dec 25, 2015 at 18:53

5 votes

4 answers

2k views

Tritium decay is spontaneous even if the binding energy of tritium is higher than the binding energy of 3He. Why?

asked Jun 7, 2014 at 10:54

4 votes

2 answers

4k views

optical diffusion (scattering) versus refraction

asked Jun 26, 2014 at 9:11

4 votes

0 answers

320 views

Cauchy stress tensor for a spherically symmetric problem [closed]

asked Dec 27, 2015 at 18:44

3 votes

1 answer

1k views

Perturbation theory in second quantization

asked Jul 31, 2015 at 15:48

3 votes

1 answer

1k views

Plane wave complex notation

asked Jul 5, 2014 at 17:26

3 votes

1 answer

648 views

Is it possible to measure the radius of an elementary particle?

asked Jun 6, 2014 at 12:31

2 votes

1 answer

2k views

Peaks in binding energy per nucleon

asked Jun 6, 2014 at 18:12

2 votes

1 answer

2k views

Why is the Maxwell Stress Tensor symmetric?

asked Jun 19, 2013 at 9:00

2 votes

1 answer

291 views

Nuclear fission mechanism: neutron capture

asked Jun 8, 2014 at 9:39

2 votes

1 answer

457 views

Can we observe proton decay?

asked Oct 13, 2014 at 18:46

2 votes

2 answers

1k views

What are the necessary/sufficient conditions for a system to be Hamiltonian/non-Hamiltonian?

asked Jan 14, 2015 at 12:28

2 votes

2 answers

720 views

Molecular dynamics and detailed balance

asked Jan 22, 2015 at 12:12

2 votes

1 answer

1k views

Fourier transform of a set of L fermions operators

asked May 21, 2015 at 9:05

2 votes

1 answer

199 views

Estimate Uncertainties in Rietveld Refinement

asked Jul 28, 2015 at 15:24

2 votes

2 answers

454 views

Are phonons eigenstates of the momentum operator?

asked Feb 10, 2018 at 21:54

2 votes

6 answers

697 views

Are closed streamlines necessary to have vortices?

asked Feb 27 at 17:59

1 vote

0 answers

457 views

Commutation rules of field operators and Dirac delta

asked Oct 3, 2020 at 19:39

1 vote

0 answers

22 views

Convenient factorisation of position basis of the Hilbert space of lattice-periodic system

asked Nov 17, 2020 at 19:57

1 vote

0 answers

272 views

Approximate the two-body density matrix in terms of product of one-body density matrices

asked Nov 6, 2021 at 13:24

1 vote

1 answer

126 views

When and why spontaneous nuclear fission is preferred to alpha emission?

asked Jun 8, 2014 at 10:24

1 vote

1 answer

2k views

How to determine the transmission coefficient of a gaussian wave packet scattering on an finite square well?

asked May 24, 2014 at 19:26

1 vote

2 answers

1k views

Stationary state of time-independent Schroedinger equation is always real valued function?

asked May 29, 2014 at 19:13

0 votes

1 answer

2k views

X-ray diffraction on thin film

asked Jul 13, 2015 at 6:25

0 votes

1 answer

173 views

Decomposition of group representation using tensor method

asked Mar 11, 2015 at 12:27

0 votes

1 answer

137 views

Number of classical oscillation modes of a Lattice and number of quantum phonons

asked Jul 30, 2015 at 19:36

Stack Exchange Network

30 Questions

Why zero chemical potential does not allow the Bose-Einstein Condensation of Phonons?

$SU(3)$ irreducible representations with tensor method

Irrotational fluid

$SU(2)$ generators and creation annihilation operators

Clever way to show a property of Lie transformation

Tritium decay is spontaneous even if the binding energy of tritium is higher than the binding energy of 3He. Why?

optical diffusion (scattering) versus refraction

Cauchy stress tensor for a spherically symmetric problem [closed]

Perturbation theory in second quantization

Plane wave complex notation

Is it possible to measure the radius of an elementary particle?

Peaks in binding energy per nucleon

Why is the Maxwell Stress Tensor symmetric?

Nuclear fission mechanism: neutron capture

Can we observe proton decay?

What are the necessary/sufficient conditions for a system to be Hamiltonian/non-Hamiltonian?

Molecular dynamics and detailed balance

Fourier transform of a set of L fermions operators

Estimate Uncertainties in Rietveld Refinement

Are phonons eigenstates of the momentum operator?

Are closed streamlines necessary to have vortices?

Commutation rules of field operators and Dirac delta

Convenient factorisation of position basis of the Hilbert space of lattice-periodic system

Approximate the two-body density matrix in terms of product of one-body density matrices

When and why spontaneous nuclear fission is preferred to alpha emission?

How to determine the transmission coefficient of a gaussian wave packet scattering on an finite square well?

Stationary state of time-independent Schroedinger equation is always real valued function?

X-ray diffraction on thin film

Decomposition of group representation using tensor method

Number of classical oscillation modes of a Lattice and number of quantum phonons