| F. H. L. Koppens, C. Buizert, K. J. Tielrooij, I. T. Vink, K. C. Nowack, T. Meunier, L. P. Kouwenhoven & L. M. K. Vandersypen
The paper reports the experimental realization of driven coherent single spin rotations in a double quantum dot system. The authors apply a continuous-wave oscillating magnetic field generated on-chip to observe electron spin resonance in spin-dependent transport measurements. They then coherently control the quantum state of the electron spin by applying short bursts of the oscillating magnetic field, observing about eight oscillations of the spin state (Rabi oscillations) during a microsecond burst. This demonstrates the feasibility of operating single-electron spins in a quantum dot as quantum bits. The study also discusses the role of the nuclear spin bath in ESR detection, the time evolution of the spin states during RF bursts, and the theoretical model for understanding the amplitudes and decay times of the oscillations. The results pave the way for further advancements in quantum computing, including the implementation of universal quantum gates and the measurement of Bell's inequalities.The paper reports the experimental realization of driven coherent single spin rotations in a double quantum dot system. The authors apply a continuous-wave oscillating magnetic field generated on-chip to observe electron spin resonance in spin-dependent transport measurements. They then coherently control the quantum state of the electron spin by applying short bursts of the oscillating magnetic field, observing about eight oscillations of the spin state (Rabi oscillations) during a microsecond burst. This demonstrates the feasibility of operating single-electron spins in a quantum dot as quantum bits. The study also discusses the role of the nuclear spin bath in ESR detection, the time evolution of the spin states during RF bursts, and the theoretical model for understanding the amplitudes and decay times of the oscillations. The results pave the way for further advancements in quantum computing, including the implementation of universal quantum gates and the measurement of Bell's inequalities.