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Implement inds method for physical and virtual indices #186

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Aug 14, 2024
Merged

Implement inds method for physical and virtual indices #186

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10b5f10
Implement `inds` for getting physical and virtual indices subsets
mofeing Aug 14, 2024
74320fa
Test physical and virtual inds
mofeing Aug 14, 2024
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11 changes: 11 additions & 0 deletions src/Quantum.jl
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Original file line number Diff line number Diff line change
@@ -1,3 +1,5 @@
using KeywordDispatch

"""
AbstractQuantum

Expand Down Expand Up @@ -174,6 +176,15 @@ function Base.show(io::IO, q::Quantum)
end

@kwmethod inds(tn::AbstractQuantum; at) = Quantum(tn).sites[at]
@kwmethod function inds(tn::AbstractQuantum; set)
if set === :physical
return values(Quantum(tn).sites)
elseif set === :virtual
return setdiff(inds(tn), values(Quantum(tn).sites))
else
return inds(TensorNetwork(tn); set)
end
end

"""
adjoint(q::Quantum)
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12 changes: 12 additions & 0 deletions test/Quantum_test.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,9 @@
@test nsites(qtn; set=:outputs) == 1
@test issetequal(sites(qtn), [site"1"])
@test socket(qtn) == State(; dual=false)
@test inds(qtn; at=site"1") == :i
@test issetequal(inds(qtn; set=:physical), [:i])
@test isempty(inds(qtn; set=:virtual))

# forwarded methods to `TensorNetwork`
@test TensorNetwork(qtn) == tn
Expand All @@ -20,6 +23,9 @@
@test nsites(qtn; set=:outputs) == 0
@test issetequal(sites(qtn), [site"1'"])
@test socket(qtn) == State(; dual=true)
@test inds(qtn; at=site"1'") == :i
@test issetequal(inds(qtn; set=:physical), [:i])
@test isempty(inds(qtn; set=:virtual))

_tensors = Tensor[Tensor(zeros(2, 2), [:i, :j])]
tn = TensorNetwork(_tensors)
Expand All @@ -28,6 +34,10 @@
@test nsites(qtn; set=:outputs) == 1
@test issetequal(sites(qtn), [site"1", site"1'"])
@test socket(qtn) == Operator()
@test inds(qtn; at=site"1") == :i
@test inds(qtn; at=site"1'") == :j
@test issetequal(inds(qtn; set=:physical), [:i, :j])
@test isempty(inds(qtn; set=:virtual))

_tensors = Tensor[Tensor(fill(0))]
tn = TensorNetwork(_tensors)
Expand All @@ -36,6 +46,8 @@
@test nsites(qtn; set=:outputs) == 0
@test isempty(sites(qtn))
@test socket(qtn) == Scalar()
@test isempty(inds(qtn; set=:physical))
@test isempty(inds(qtn; set=:virtual))

# detect errors
_tensors = Tensor[Tensor(zeros(2), [:i]), Tensor(zeros(2), [:i])]
Expand Down
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