Fig. 2
From: Coherent coupling between a quantum dot and a donor in silicon
Hyperfine ST rotations. a Pulse sequence for the spin manipulations with schematic conduction band diagrams through the reservoir, QD and donor. The system is initialized as (4, 0)S and plunged to point P. Then, the detuning is pulsed rapidly to point A, which yields a separated (3, 1)S. After a given manipulation time in (3, 1), which rotates the spin between S and T 0, it is pulsed back to point P. The state is then either (4, 0)S or (4, 0)T 0, and is measured by going to point M, where an enhancement in CS signal occurs (see Supplementary Note 4). b QD-D charge stability diagram. Overlaid are the different points of the experiment’s pulse sequence. The detuning \(\epsilon \) is defined along the black line with zero detuning at the center of the (4, 0) ↔ (3, 1) transition. c Triplet probability vs. manipulation time for \(\epsilon \) = 950 μeV. The oscillation frequency is f = 56.9 MHz. This is not the bare hyperfine frequency due to a residual exchange of J/h = 27 MHz, see Fig. 3c. Inset: Frequency of the oscillations for repeated measurements over 3 h. Each point represents data averaged over 22 min, and the error bar represents the 95% confidence interval
