Two-Qubit Quantum Computing using Pulsed ESR of N@C$_{60}$

N@C$_{60}$ is a fullerene molecule containing an atom of nitrogen. The low-temperature decoherence time, $T_{2}$, can be increased to 215 $\mu $s, which is attractive for quantum information processing applications. The electronic and nuclear spins of the nitrogen atom are good quantum numbers in a strong magnetic field, coupled by the hyperfine interaction. Pulsed ENDOR (electron nuclear double resonance) can be used to initialize, manipulate and measure this two-qubit system. We used dynamic nuclear polarization (DNP) to prepare an initial state in which the nuclear and electronic spins were aligned with the applied field.