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Make fock non-mutating #438

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Merged
merged 5 commits into from
Apr 5, 2025
Merged

Make fock non-mutating #438

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e18115a
[no ci] Make `fock` non-mutating
albertomercurio Apr 5, 2025
eccdf1a
Make changelog
albertomercurio Apr 5, 2025
dd81229
Fix typo error
albertomercurio Apr 5, 2025
e6e12cb
Fix another typo
albertomercurio Apr 5, 2025
6da162c
Update changelog and format
albertomercurio Apr 5, 2025
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2 changes: 2 additions & 0 deletions CHANGELOG.md
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Expand Up @@ -8,6 +8,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
## [Unreleased](https://github.com/qutip/QuantumToolbox.jl/tree/main)

- Make CUDA conversion more general using Adapt.jl. ([#437])
- Make the generation of `fock` states non-mutating to support Zygote.jl. ([#438])

## [v0.29.1]
Release date: 2025-03-07
Expand Down Expand Up @@ -190,3 +191,4 @@ Release date: 2024-11-13
[#428]: https://github.com/qutip/QuantumToolbox.jl/issues/428
[#430]: https://github.com/qutip/QuantumToolbox.jl/issues/430
[#437]: https://github.com/qutip/QuantumToolbox.jl/issues/437
[#438]: https://github.com/qutip/QuantumToolbox.jl/issues/438
3 changes: 1 addition & 2 deletions src/qobj/states.jl
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Expand Up @@ -37,8 +37,7 @@ function fock(N::Int, j::Int = 0; dims::Union{Int,AbstractVector{Int},Tuple} = N
if getVal(sparse)
array = sparsevec([j + 1], [1.0 + 0im], N)
else
array = zeros(ComplexF64, N)
array[j+1] = 1
array = [j == i ? 1.0 + 0im : 0.0 + 0im for j in 1:N]
end
return QuantumObject(array; type = Ket, dims = dims)
end
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