qiskit/releasenotes/notes/1.2/replace-initialization-algo...

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features_circuits:
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Replacing the internal synthesis algorithm of :class:`~.library.StatePreparation`
and :class:`~.library.Initialize` of Shende et al. by the algorithm given in
:class:`~.library.Isometry` of Iten et al.
The new algorithm reduces the number of CX gates and the circuit depth by a factor of 2.