ITensor / ITensor/ITensorMPS.jl
[ITensors] [BUG] `add(::MPS, ::MPS; alg="directsum")` broken for mismatched arrow directions
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bug
- Dominant language
- Julia
- Stars
- 85
- Forks
- 27
- Avg merge
- 22m
- Merged PRs (30d)
- 1
Description
See ITensor/ITensors.jl#1338.
Contributor guide
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First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reading the linked reference, ITensor/ITensors.jl#1338, to understand the reported mismatch in arrow directions. Then locate the add(::MPS, ::MPS; alg="directsum") implementation and its tests; done means the directsum operation works for mismatched arrow directions with coverage for the regression.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- julia
- Domain
- backend
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100