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user140255
  • Member for 7 years, 5 months
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22 votes
5 answers
4k views

What is the link between the BCS ground state and superconductivity?

15 votes
3 answers
2k views

Grand canonical hamiltonian and thermodynamic ensembles

15 votes
1 answer
801 views

What happens when an electric charge crosses the event horizon?

12 votes
2 answers
2k views

Schrödinger equation under a unitary/coordinate transform

10 votes
2 answers
2k views

What is so special about spontaneous symmetry breaking? (time reversal example)

8 votes
3 answers
294 views

Is there a physical limit to memory reading and writing speed?

8 votes
3 answers
1k views

Why should symmetries be described by invertible transformations?

7 votes
2 answers
1k views

Does a gauge transformation leave physics invariant?

6 votes
3 answers
935 views

What is the physical content of the principle of least action?

5 votes
1 answer
213 views

How can a phase transition depend on temperature?

4 votes
2 answers
221 views

Why is it necessary to irreversibly erase a memory?

4 votes
1 answer
158 views

Variables of an SO(3)-invariant function (hamiltonian)

4 votes
1 answer
309 views

Are broken symmetry states non-stationary?

3 votes
1 answer
100 views

How a non-zero superconducting order parameter translates to superconducting bebaviour?

2 votes
1 answer
89 views

Do past states of a system have lower entropy?

2 votes
2 answers
310 views

Why are interacting electron systems hard to solve?

2 votes
0 answers
320 views

General questions on the superconducting order parameter

1 vote
1 answer
1k views

Partition function of quantum harmonic oscillator: why do I get the classical result?

1 vote
1 answer
199 views

Different ways to perform an adiabatic expansion

1 vote
0 answers
36 views

How should physical quantities transform under translation?

0 votes
1 answer
528 views

Bravais lattice point groups

0 votes
2 answers
192 views

Conserved quantities and symmetries of the free 1D particle

0 votes
1 answer
911 views

How to show that the change of entropy is zero for a thermally insulated system?

0 votes
0 answers
246 views

Fourier transform of a correlation function

0 votes
0 answers
104 views

How does phase gets aligned in a superconductor?

0 votes
0 answers
131 views

Are nucleons, atoms and molecules identical particles?