Fix dynamics backend to accept density-matrix initial state#3967
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sacpis merged 3 commits intoNVIDIA:mainfrom Feb 17, 2026
Merged
Fix dynamics backend to accept density-matrix initial state#3967sacpis merged 3 commits intoNVIDIA:mainfrom
sacpis merged 3 commits intoNVIDIA:mainfrom
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…FromData Signed-off-by: Sachin Pisal <spisal@nvidia.com>
…d-trip Signed-off-by: Sachin Pisal <spisal@nvidia.com>
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Signed-off-by: Sachin Pisal <spisal@nvidia.com>
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Feb 17, 2026
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The dynamics backend did not override createFromData. For cudaq.state.from_data(rho) with a 2D density matrix rho the Python layer correctly builds a complex_matrix in a state_data variant. When the dynamics simulator created the initial state, it used the base SimulationState::createFromData(), which only supports 1D state-vector data. It calls getSizeAndPtr(), which does not handle the complex_matrix variant.
Fixes #3966.