Using the HyperCubic struct to define models

[LinjianMa]

Struct at:

ITensorNetworkAD.jl/src/ITensorNetworks/tensor_networks.jl

Lines 33 to 40 in c178a13

	struct HyperCubic{N}
	dims::NTuple{N,Int}
	end
	Base.size(l::HyperCubic) = l.dims
	const Chain = HyperCubic{1}
	const Square = HyperCubic{2}
	const Cubic = HyperCubic{3}

The square_lattice in ITensors.jl is more geared towards a 1-dimensional "snake" pattern through a 2-dimensional lattice. The Square lattice type is more directly suited for 2 dimensions (for example, there are iterators over bonds/edges which are of the form ((2, 2), (2, 3)), so actual 2-dimensional coordinates for the sites).

The localham_term function would need to be adapted to those new types of bonds.

[mtfishman]

Cross reference: #8 (comment)_

[LinjianMa]

Fixed by #30