Creates a constant operator.
operator (np.ndarray or Tensor) – The operator \(A\), or a batch of operators. It must have at
least two dimensions, and its last two dimensions must be equal.
The operator \(t\mapsto A\) (or batch of
operators, if you provide a batch of operators).
Corresponding operation for Pwcs.
Create a batch of constant Stfs.
Create an Stf operator.