Molecular Nanomagnets as Qubits with Embedded Quantum-Error Correction

We show that molecular nanomagnets have a potential advantage in the crucialrush toward quantum computers. Indeed, the sizable number of accessible low-energy states ofthese systems can be exploited to define qubits with embedded quantum error correction. Wederive the scheme to achieve this crucial objective and the corresponding sequence ofmicrowave/radiofrequency pulses needed for the error correction procedure. The effectivenessof our approach is shown already with a minimal S = 3/2 unit corresponding to an existingmolecule, and the scaling to larger spin systems is quantitatively analyzed.