qiskit/releasenotes/notes/2.0/improve-decomposition-contr...

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features_circuits:
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Reduce the number of two-qubit gates when decomposing some multi-controlled
single-qubit unitary gates. For example,
* For multi-controlled :class:`.YGate` on 10 qubits, we reduce the :class:`.CXGate` count by 56%,
* For multi-controlled :class:`.HGate` on 10 qubits, we reduce the :class:`.CXGate` count by 56%,
* For multi-controlled :class:`.SXGate` and :class:`.SXdgGate` on 10 qubits, we reduce the :class:`.CXGate` count by 80%,
* For multi-controlled :class:`.UGate` on 10 qubits, we reduce the :class:`.CXGate` count by 31%.