CFT spectrum for fermions#192
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VictorVanthilt
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Jun 16, 2026
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Looks good already, I like the tuples for labeling the different spin structures. We need docs
- Add Base.vcat(v1, v2) for StructuredVector: concatenates underlying data
and merges sector-index dictionaries, shifting v2's indices by length(v1)
- Add Base.reduce(::typeof(vcat), ...) override: Julia Base's specialised
reduce(::vcat, A) bypasses pairwise vcat and loses the container, so we
delegate to foldl(vcat, A) instead
- Remove unused V type parameter from StructuredVector (always Vector{Int})
and propagate the simplification to CFTData
- Extract _row_transfer_matrix helper in transfer_matrix.jl, used by the
refactored _scaling_dimensions in cft.jl
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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This PR adds the ability to calculate CFT spectrum for fermionic tensor networks. Closes #188.
@tensor; APBC (Neveu-Schwarz) sector does not need it, and is cancelled by an addition twist in transfer matrices. The identity field should be in the NS sector without additional symmetry charges.(:NS, charge)and(:R, charge).Secondary changes
run!interface forLoopTNRis now more flexible.Base.vcatis implemented forStructuredVectorto join CFT data from different spin structures.structurein aStructuredVectoris always of typeDict{K, Vector{Int}}, I removed one type parameter from bothStructuredVectorandCFTData.TODO