mtfishman

[deps]
Git = "d7ba0133-e1db-5d97-8f8c-041e4b3a1eb2"
ITensorPkgSkeleton = "3d388ab1-018a-49f4-ae50-18094d5f71ea"
Pkg = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
RegistryInstances = "2792f1a3-b283-48e8-9a74-f99dce5104f3"
Suppressor = "fd094767-a336-5f1f-9728-57cf17d0bbfb"

mtfishman

module KroneckerIndexing

using Kronecker: Kronecker, ⊗

kronecker_arguments(a::AbstractArray) = Kronecker.getmatrices(a)

struct KroneckerIndex
  A::Int
  B::Int
end

mtfishman

using ExplicitImports: explicit_imports
using SplitApplyCombine: group

function prepend_line(file, string)
  f = open(file, "r+")
  buf = IOBuffer()
  write(buf, string * "\n")
  write(buf, f)
  seekstart(buf)
  seekstart(f)

mtfishman

function template(; user, authors)
    @eval begin
        using PkgTemplates
        default_git_ignore() = [
            "*.o",
            "*.swp",
            ".tmp",
            "Manifest.toml",
            "docs/build/",
            ".DS_Store",

mtfishman

_setdiff(s) = Base.copymutable(s)
_setdiff(s, itrs...) = _setdiff!(Base.copymutable(s), itrs...)
function _setdiff!(s, itrs...)
  for x in itrs
    _setdiff!(s, x)
  end
  return s
end
function _setdiff!(s, itr)
  isempty(s) && return s

mtfishman

using ITensors

# A type that specifies the model. Used
# for dispatch on functions `mpo` and
# `localham_term`.
struct Model{model} end

Model(s::AbstractString) = Model{Symbol(s)}()

# For notation:

mtfishman

#include "itensor/all.h"

using namespace itensor;

IQIndex
directSum(IQIndex const& i, IQIndex const& j, Args const& args = Args::global())
  {
  auto name = args.getString("IndexName","sum");
#ifdef DEBUG
  if( i.dir() != j.dir() ) Error("In directSum(IQIndex, IQIndex), input indices must have same arrow direction");