Skip to main content
B. Brekke's user avatar
B. Brekke's user avatar
B. Brekke's user avatar
B. Brekke
  • Member for 7 years, 4 months
  • Last seen more than a week ago
  • Norway
26 votes
1 answer
4k views

Did I get hit by a car this morning?

22 votes
1 answer
5k views

What is so topological about topological phase transitions?

17 votes
3 answers
2k views

Why is the effective mass of silicon anisotropic?

9 votes
1 answer
526 views

Can superconductors undergo a BKT transition?

9 votes
4 answers
4k views

Integral form for partition sum

8 votes
0 answers
144 views

How does one measure effective mass in a multivalley semiconductor?

6 votes
1 answer
2k views

What happens in the Hartree and Fock diagrams?

4 votes
0 answers
334 views

What is the difference between a skyrmion and a magnetic vortex?

4 votes
2 answers
600 views

Is it possible that a series of Feynman diagrams converge?

3 votes
1 answer
207 views

Is the magnetic quantum number dependent on my choice of coordinate system?

3 votes
0 answers
98 views

Do imaginary measurements exists? [duplicate]

3 votes
0 answers
91 views

Do Goldstone modes with linear dispersion always correspond to superfluidity?

2 votes
1 answer
499 views

What is a mean field?

2 votes
1 answer
54 views

Can I have detailed balance without reverse updates?

2 votes
0 answers
144 views

How can we calculate autocorrelation?

1 vote
1 answer
203 views

What happens to the space group of a crystal when introducing a non-trivial basis?

1 vote
1 answer
65 views

How does a thermal propagator work?

1 vote
0 answers
58 views

Why are degenerate ground states interesting?

1 vote
1 answer
98 views

Why are the autocorrelations larger for the energy at the critical temperature?

1 vote
1 answer
319 views

Ramsauer-Townsend effect one dimension

1 vote
0 answers
64 views

What will happen to a particle in a vortex?

0 votes
2 answers
323 views

Commuting angular momentum

0 votes
2 answers
189 views

Time factor in time independent Schrödinger Equation

0 votes
2 answers
279 views

Quantum mechanics, uncertainty and measurement

0 votes
1 answer
404 views

Strange symmetry of Haldane model edge

0 votes
1 answer
74 views

What does it mean to assign group operations to distinct sets for space groups?

0 votes
1 answer
365 views

What does Dirac cones at the $K$ and $K'$ point mean?