Start using ITensorMPS.jl

Project.toml

@@ -8,14 +8,16 @@ Accessors = "7d9f7c33-5ae7-4f3b-8dc6-eff91059b697"
 Compat = "34da2185-b29b-5c13-b0c7-acf172513d20"
 Distributed = "8ba89e20-285c-5b6f-9357-94700520ee1b"
 Folds = "41a02a25-b8f0-4f67-bc48-60067656b558"
+ITensorMPS = "0d1a4710-d33b-49a5-8f18-73bdf49b47e2"
 ITensors = "9136182c-28ba-11e9-034c-db9fb085ebd5"
 MPI = "da04e1cc-30fd-572f-bb4f-1f8673147195"
 
 [compat]
 Accessors = "0.1.26"
 Compat = "4.8"
 Folds = "0.2.8"
-ITensors = "0.3.58"
+ITensorMPS = "0.1.7"
+ITensors = "0.3.58, 0.4, 0.5, 0.6"
 MPI = "0.20"
 julia = "1.6"
 

examples/01_parallel_mpo_sum_2d_hubbard_conserve_momentum.jl

@@ -4,15 +4,19 @@ rmprocs(setdiff(procs(), 1))
 addprocs(2)
 @show nprocs()
 
-@everywhere using ITensors
+@everywhere using ITensorMPS
 @everywhere using ITensorParallel
-using Random
+@everywhere using ITensors
+using LinearAlgebra: BLAS
+using Random: Random
+using Strided: Strided
 
-include(joinpath(pkgdir(ITensors), "examples", "src", "electronk.jl"))
-include(joinpath(pkgdir(ITensors), "examples", "src", "hubbard.jl"))
+electronk_path = joinpath(pkgdir(ITensors), "src", "lib", "ITensorMPS", "examples", "src")
+include(joinpath(electronk_path, "electronk.jl"))
+include(joinpath(electronk_path, "hubbard.jl"))
 
-ITensors.BLAS.set_num_threads(1)
-ITensors.Strided.disable_threads()
+BLAS.set_num_threads(1)
+Strided.disable_threads()
 
 """
 Run with:

examples/02_mpi_mpo_sum_2d_hubbard_conserve_momentum.jl

@@ -1,14 +1,18 @@
-using MPI
+using MPI: MPI
 MPI.Init()
-using ITensors
+using ITensorMPS
 using ITensorParallel
-using Random
+using ITensors
+using LinearAlgebra: BLAS
+using Random: Random
+using Strided: Strided
 
-include(joinpath(pkgdir(ITensors), "examples", "src", "electronk.jl"))
-include(joinpath(pkgdir(ITensors), "examples", "src", "hubbard.jl"))
+electronk_path = joinpath(pkgdir(ITensors), "src", "lib", "ITensorMPS", "examples", "src")
+include(joinpath(electronk_path, "electronk.jl"))
+include(joinpath(electronk_path, "hubbard.jl"))
 
-ITensors.BLAS.set_num_threads(1)
-ITensors.Strided.disable_threads()
+BLAS.set_num_threads(1)
+Strided.disable_threads()
 
 """
 Run at the command line with 4 processes:
@@ -84,7 +88,7 @@ function main(;
 
   if disk
     # Write-to-disk
-    mpo_sum_term = ITensors.disk(mpo_sum_term)
+    mpo_sum_term = ITensorMPS.disk(mpo_sum_term)
   end
 
   energy, psi = @time dmrg(mpo_sum_term, psi0; nsweeps, maxdim, cutoff, noise)

examples/03_partition_2d_heisenberg.jl

@@ -1,5 +1,6 @@
-using ITensors
+using ITensorMPS
 using ITensorParallel
+using ITensors
 
 function heisenberg_2d(nx, ny)
   lattice = square_lattice(nx, ny; yperiodic=false)

examples/Project.toml

@@ -0,0 +1,8 @@
+[deps]
+Distributed = "8ba89e20-285c-5b6f-9357-94700520ee1b"
+ITensorMPS = "0d1a4710-d33b-49a5-8f18-73bdf49b47e2"
+ITensorParallel = "0fccfcd2-f061-4985-9740-339d3f86bfce"
+ITensors = "9136182c-28ba-11e9-034c-db9fb085ebd5"
+LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
+Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
+Strided = "5e0ebb24-38b0-5f93-81fe-25c709ecae67"

src/ITensorParallel.jl

@@ -4,24 +4,24 @@ using Accessors
 using Compat
 using Distributed
 using Folds
-using MPI
+using ITensorMPS
 using ITensors
 using ITensors.NDTensors
+using MPI
 
 using ITensors: Algorithm, @Algorithm_str
-using ITensors.ITensorMPS: AbstractSum
+using ITensorMPS: AbstractSum
 
 import Base: eltype, length, size
-import ITensors: product
-import ITensors.ITensorMPS:
+import ITensors: product, replaceind!
+import ITensorMPS:
   disk,
   linkind,
   lproj,
   noiseterm,
   nsite,
   orthogonalize!,
   position!,
-  replaceind!,
   replacebond!,
   rproj,
   set_terms,

test/Project.toml

@@ -2,8 +2,11 @@
 ArgParse = "c7e460c6-2fb9-53a9-8c5b-16f535851c63"
 Compat = "34da2185-b29b-5c13-b0c7-acf172513d20"
 Distributed = "8ba89e20-285c-5b6f-9357-94700520ee1b"
+ITensorMPS = "0d1a4710-d33b-49a5-8f18-73bdf49b47e2"
 ITensorParallel = "0fccfcd2-f061-4985-9740-339d3f86bfce"
 ITensors = "9136182c-28ba-11e9-034c-db9fb085ebd5"
+LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 MPI = "da04e1cc-30fd-572f-bb4f-1f8673147195"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
+Strided = "5e0ebb24-38b0-5f93-81fe-25c709ecae67"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"

test/test_mpi_example.jl

@@ -1,6 +1,6 @@
-using MPI
+using MPI: MPI, mpiexec
 using ITensorParallel
-using Test
+using Test: @testset
 
 @testset "Test $(@__FILE__)" begin
   examples_dir = joinpath(pkgdir(ITensorParallel), "examples")
@@ -18,10 +18,8 @@ using Test
     Ny = 4
     nsweeps = 2
     maxdim = 20
-    mpiexec() do exe  # MPI wrapper
-      run(
-        `$exe -n $(nprocs) $(Base.julia_cmd()) --threads $(Threads.nthreads()) $(joinpath(examples_dir, example_file)) --Nx $(Nx) --Ny $(Ny) --nsweeps $(nsweeps) --maxdim $(maxdim) --disk $(disk) --threaded_blocksparse $(threaded_blocksparse)`,
-      )
-    end
+    run(
+      `$(mpiexec()) -n $(nprocs) $(Base.julia_cmd()) --threads $(Threads.nthreads()) $(joinpath(examples_dir, example_file)) --Nx $(Nx) --Ny $(Ny) --nsweeps $(nsweeps) --maxdim $(maxdim) --disk $(disk) --threaded_blocksparse $(threaded_blocksparse)`,
+    )
   end
 end

test/test_sequential_threaded_distributed_example.jl

@@ -1,5 +1,5 @@
 using ITensorParallel
-using Test
+using Test: @testset
 
 @testset "Test $(@__FILE__)" begin
   examples_dir = joinpath(pkgdir(ITensorParallel), "examples")