Optimal bang-bang protocols are derived for preparing the three-qubit W state from a product state using XY-coupled qubits and single-qubit drives, with the quantum speed limit characterized via Pontryagin's principle.
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Optimal preparation of the $W$ state for qubits with XY coupling
Optimal bang-bang protocols are derived for preparing the three-qubit W state from a product state using XY-coupled qubits and single-qubit drives, with the quantum speed limit characterized via Pontryagin's principle.