v0.4.1

ITensors v0.4.1

Diff since v0.4.0

Merged pull requests:

• [CI][ITensorGPU] Update to latest Metal.jl, fix ITensorGPU CI (#1383) (@kmp5VT)
• [Docs] Section about running on GPUs (#1389) (@iagoleal)
• [NDTensors] HDF5 package extension (#1390) (@emstoudenmire)
• [README] Fix downloads count badge (#1398) (@pricklypointer)
• [ITensors] Move submodules to lib directory (#1399) (@mtfishman)
• [ITensors] Start organizing into submodules (#1400) (@mtfishman)

Closed issues:

• Make plussers a Tensor function (#145)
• Promote QNs when constructing ITensors or creating IndexSets (#176)
• Add block sparse matrix/tensor decompositions (#190)
• Restore QR in orthogonalize! (#220)
• Lazy ITensor contraction (#248)
• Optimizations for block sparse operations (#266)
• Print flux of QN ITensor and checkflux function (#268)
• ITensor iteration features (#281)
• MPS and MPO interface updates (#285)
• Documentation improvements (#289)
• Generalize map!(::Function, ::ITensor...) (#343)
• Improvements to TagSet and SmallString (#381)
• Investigate improving load/compile times by changing optimization level (#404)
• Consider using rational numbers for fractional QNs (#410)
• Add a debug check that all Indices in an IndexSet are unique (#415)
• Broadcasting over IndexSet issue (#416)
• New QN ITensor constructors (#418)
• Add normalize!(::MPS/MPO) (#500)
• DMRG eigsolve keyword argument names (#502)
• Generalize tr(::MPO) even more (#510)
• Add "RandomUnitary" gate (#594)
• If gesdd fails, automatically try gesvd (#595)
• Add blockrange function (#633)
• Add documentation for keyword arguments for dmrg (such as outputlevel) (#687)
• Add more support for accepting either Index and collections of Index throughout ITensors.jl (#732)
• Use LoopVectorization to optimize certain tensor contractions like reductions to scalars (#740)
• Document filterinds (#742)
• Add compatible function checking sites against MPS, MPO (#743)
• [ITensors] [BUG] Loading ITensors breaks basic StaticArrays functionality (#931)
• [ITensorGPU] [BUG] cuITensor(m, n) * delta(m, n) causes BoundsError (#1143)
• [NDTensors] [ENHANCEMENT] Support arbitrary label types in contract (#1203)
• [NDTensors] [ENHANCEMENT] Disable allowscalar in test suite (#1230)
• [ITensors] [ENHANCEMENT] Documentation about GPU support (#1387)
• [ITensorGPU] [BUG] Circuits starting with Rx gates fail (v0.1.6) (#1396)