Hamiltonian:
H = −J_e Σ_v A_v − J_m Σ_p B_p
Vertex: A_v = ⊗_{i∈v} σ_i^x
Plaquette: B_p = ⊗_{i∈p} σ_i^z
Entanglement entropy:
S(R) = α|∂R| − γ + ...
γ = ln D = ln 2
e-anyon: A_v = −1 (red vertices)
m-anyon: B_p = −1 (blue plaquettes)
Anyons come in pairs (strings)