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vprusso/toqito Contributions

PR #1390 – Parameterize random_psd_operator with Wishart Distribution Option
Merged: Apr 2026

Added distribution: Literal["uniform", "wishart"] parameter to random_psd_operator with full backward compatibility
Implemented Wishart sampling with correct complex normalization (/sqrt(2)) following Goodman (1963)
Added optional scale (PSD scale matrix) and num_degrees (degrees of freedom) parameters for full Wishart parameterization
Added np.asarray coercion for scale to gracefully handle list/tuple input
Added validation for scale shape and positive semidefiniteness, and integer/positivity checks for num_degrees
Added UserWarning for rank-deficient Wishart matrices (num_degrees < dim) and ignored Wishart params on uniform path
Updated docstring with Raises section, Google-style format, and mkdocs-compatible examples

PR #1391 – Ensure partial_trace Raises ValueError for Invalid Parameters
Merged: Apr 2026

Added explicit square matrix check with clear ValueError: input_mat must be a 2D square matrix
Added np.prod(dim) != n validation to catch mismatched subsystem dimensions
Added out-of-bounds and negative index validation for sys subsystem indices
Broadened dim and sys type support to accept list, tuple, and np.ndarray using np.asarray
Updated type annotations and docstring Raises section to document all ValueError conditions
Replaced silent NumPy failures and cryptic IndexError crashes with actionable error messages