Timeline for Difference between $\nu=5/2$ quantum Hall state, chiral p-wave superconductor, He 3
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 29, 2016 at 17:26 | vote | accept | nesseril | ||
| Jan 28, 2016 at 19:14 | comment | added | Meng Cheng | This is a simple exercise: take your favorite lattice model of $p+ip$ superconductor, determine the fermion parity of the ground state on a torus with periodic/anti-periodic boundary conditions. You go to momentum space, and observe that except four high symmetry points ( $(0,0), (0, \pi), (\pi,0), (\pi,\pi)$, all other momentums are paired up, so we only need to look at these four points. The pairing vanishes at these four points, so we just need to find whether these four points are occupied or not. | |
| Jan 28, 2016 at 18:35 | comment | added | nesseril | Thank for the nice answer and the reference (it looks indeed very useful). There is one thing which I have trouble to understand: how you get to the number 3 (ground state degeneracy) -> how you can say which states has an odd number of fermions? | |
| Jan 28, 2016 at 18:05 | history | answered | Meng Cheng | CC BY-SA 3.0 |