Toric code ground-state degeneracy on a genus-g closed orientable surface. From framework F8 (TQFT cobordism), the dimension of H_Σ_g is a topological invariant. For the Z_2 toric code (Kitaev 2003) the ground state is a product of…
Toric code ground-state degeneracy on a genus-g closed orientable surface. From framework F8 (TQFT cobordism), the dimension of H_Σ_g is a topological invariant. For the Z_2 toric code (Kitaev 2003) the ground state is a product of…