iqm.benchmarks.compressive_gst.mgst.utils_gst.basis_transform

iqm.benchmarks.compressive_gst.mgst.utils_gst.basis_transform#

iqm.benchmarks.compressive_gst.mgst.utils_gst.basis_transform(matrix: ndarray, in_basis: str = 'std', out_basis: str = 'pp') → ndarray#

Transform a matrix or vector between standard and Pauli bases.

Parameters:

  • matrix (ndarray) – Input matrix (superoperator) or vector (vectorized density matrix) to transform. For vectors: shape (pdim^2,) For matrices: shape (pdim^2, pdim^2)

  • in_basis (str) – Input basis, either “std” (standard) or “pp” (Pauli).

  • out_basis (str) – Output basis, either “std” (standard) or “pp” (Pauli).

Returns:

Transformed matrix or vector in the output basis. Returns real part for transformations involving Pauli basis.

Raises:

ValueError – If in_basis or out_basis is not “std” or “pp”.

Return type:

ndarray

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