active_space_for_ctrl_spec

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Returns the “active” subspace corresponding to signature and ctrl_spec.

qualtran.simulation.tensor.active_space_for_ctrl_spec(
    signature: qualtran.Signature,
    ctrl_spec: qualtran.CtrlSpec
) -> Tuple[Union[int, slice], ...]

Assumes first n-registers for signature are control registers corresponding to ctrl_spec. Returns a tuple of indices/slices that can be used to address into the ndarray, representing tensor data of shape tensor_shape_from_signature(signature), and access the active subspace.