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Handle single basis in embed #24

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Handle single basis in embed #24

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13 changes: 13 additions & 0 deletions src/embed_permute.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,19 @@ embed(basis_l::CompositeBasis, basis_r::CompositeBasis, index::Integer, op::Abst
embed(basis::CompositeBasis, indices, operators::Vector{T}) where {T<:AbstractOperator} = embed(basis, basis, indices, operators)
embed(basis::CompositeBasis, indices, op::AbstractOperator) = embed(basis, basis, indices, op)

"""
embed(basis::Basis, indices, ops::AbstractOperator)

Special case of the `embed` to handle embedding an operator `ops` into a single
basis.
"""
function embed(basis::Basis, indices, ops::AbstractOperator)
if indices == 1 || indices == (1,) || indices == [1]
return ops
else
throw(ArgumentError("Invalid indices for single basis."))
end
end

"""
embed(basis1[, basis2], indices::Vector, operators::Vector)
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