1.
Phys Rev Lett
; 99(9): 097202, 2007 Aug 31.
Artigo
em Inglês
| MEDLINE
| ID: mdl-17931030
RESUMO
We construct a Hamiltonian that singles out the chiral spin liquid on a square lattice with periodic boundary conditions as the exact and, apart from the twofold topological degeneracy, unique ground state.
