User Vivian

6 votes

0 answers

374 views

Does the spin1/2 rotation operator rotate spin in real space?

asked Feb 11, 2017 at 6:55

6 votes

2 answers

4k views

Why the generator of $U(1)$ is the particle number operator $N$?

asked Feb 13, 2017 at 5:41

5 votes

2 answers

4k views

What is the difference between symmetry protected topological (SPT) order and topological order?

asked Feb 15, 2017 at 9:46

4 votes

3 answers

2k views

What is the 4-dimensional matrix representation of rotation operator?

asked Feb 22, 2017 at 13:22

4 votes

1 answer

432 views

why entanglement entropy is important in topological phases？

asked Feb 13, 2017 at 8:00

3 votes

1 answer

2k views

What is the Single Mode Approximation?

asked May 30, 2016 at 13:29

2 votes

1 answer

233 views

How to use the Invariant expansion method to get the Dirac equation near the K point of graphene?

asked Oct 31, 2016 at 7:13

2 votes

0 answers

204 views

If a system has a symmetry, must the non-degenerate Ground state of it be the one-dimensional irreducible representation of the symmetry group?

asked Apr 25, 2017 at 4:16

1 vote

0 answers

696 views

What is the relation between the compressibility defined in electron liquid and that defined in thermodynamics?

asked Mar 16, 2017 at 4:00

0 votes

0 answers

290 views

Explain the characteristic features of long range entanglement

asked Feb 13, 2017 at 8:53

0 votes

0 answers

50 views

The reference which mentioned that the rotational symmetry guarantees the off-diagonal term of the conductivity matrix is antisymmetric?

asked May 9, 2017 at 4:35

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11 Questions

Does the spin1/2 rotation operator rotate spin in real space?

Why the generator of $U(1)$ is the particle number operator $N$?

What is the difference between symmetry protected topological (SPT) order and topological order?

What is the 4-dimensional matrix representation of rotation operator?

why entanglement entropy is important in topological phases？

What is the Single Mode Approximation?

How to use the Invariant expansion method to get the Dirac equation near the K point of graphene?

If a system has a symmetry, must the non-degenerate Ground state of it be the one-dimensional irreducible representation of the symmetry group?

What is the relation between the compressibility defined in electron liquid and that defined in thermodynamics?

Explain the characteristic features of long range entanglement

The reference which mentioned that the rotational symmetry guarantees the off-diagonal term of the conductivity matrix is antisymmetric?