typo

src/models.jl

@@ -400,7 +400,7 @@ hard cutoff: ``J(ω) = 2παω_c (\\frac{ω}{ω_c})^s θ(ω-ω_c)``
 The coefficients parameterise the chain Hamiltonian
 
 ``
-H = H_S + c_0 A_S⊗B_0+\\sum_{i=0}^{N-1}t_i (b_{i+1}^\\dagger + b_i +h.c.) + \\sum_{i=0}^{N-1} ϵ_ib_i^\\dagger b_i
+H = H_S + c_0 A_S⊗B_0+\\sum_{i=0}^{N-1}t_i (b_{i+1}^\\dagger b_i +h.c.) + \\sum_{i=0}^{N-1} ϵ_ib_i^\\dagger b_i
 ``
 
 which is unitarily equivalent (before the truncation to `N` sites) to