Extending existing quantum error correction codes now requires adding only n’’ physical qubits to an initial [[n’,k’]] structure, creating an [[n,k]] code where n = n’+n’’. This “appending construction” circumvents previous limitations restricting transversal Z-rotations to single-qubit and controlled-Z operations alone. Consequently, diverse sets of diagonal gates become realisable without extensive code switching beyond Hadamard implementations.
Researchers Extend Quantum Codes to Realise Multiple Rotations with Added Qubits
Extending existing quantum error correction codes now requires adding only n’’ physical qubits to an initial [[n’,k’]] structure, creating an [[n,k]] code where n = n’+n’’. This “appending construction” circumvents previous limitations restricting transversal Z-rotations to single-qubit and controlled-Z operations alone. Consequently, diverse sets of diagonal gates become realisable without extensive code switching beyond Hadamard implementations.