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Handle single basis in embed #162

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Handle single basis in embed #162

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14 changes: 14 additions & 0 deletions src/operators.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -102,6 +102,20 @@ function embed(basis_l::CompositeBasis, basis_r::CompositeBasis,
return Operator(basis_l, basis_r, data)
end

"""
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

"""
expect(op, state)

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