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fix: WindowMPOHamiltonian conj and derivative operators #447

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Merged
lkdvos merged 2 commits into from
Jul 2, 2026
Merged

fix: WindowMPOHamiltonian conj and derivative operators #447

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b620828
fix `conj`
lkdvos Jul 2, 2026
c6764bc
add derivatives
lkdvos Jul 2, 2026
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9 changes: 9 additions & 0 deletions src/algorithms/derivatives/hamiltonian_derivatives.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -199,6 +199,15 @@ function AC2_hamiltonian(
return prepare ? prepare_operator!!(H_AC2) : H_AC2
end

for f in (:AC_hamiltonian, :AC2_hamiltonian)
@eval function $f(
site::Int, below::WindowMPS, operator::WindowMPOHamiltonian, above::WindowMPS,
envs; kwargs...
)
return $f(site, below, operator.finite_ham, above, envs; kwargs...)
end
end

function JordanMPO_AC2_Hamiltonian(GL::MPSTensor, W1::JordanMPOTensor, W2::JordanMPOTensor, GR::MPSTensor)
# block accessors recompute a fresh `SparseBlockTensorMap` on every access, so bind
# them once and reuse the locals throughout
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1 change: 1 addition & 0 deletions src/operators/windowhamiltonian.jl
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Expand Up @@ -44,6 +44,7 @@ end

Base.parent(h::WindowMPOHamiltonian) = h.finite_ham
Base.copy(h::WindowMPOHamiltonian) = WindowMPOHamiltonian(copy(h.left_ham), copy(h.finite_ham), copy(h.right_ham))
Base.conj(h::WindowMPOHamiltonian) = WindowMPOHamiltonian(conj(h.left_ham), conj(h.finite_ham), conj(h.right_ham))

function Base.:+(a::WindowMPOHamiltonian, b::WindowMPOHamiltonian)
# the finite window carries full Jordan virtual spaces at its boundaries, so it has to be
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