Fig. 4
From: Coherent long-distance displacement of individual electron spins
Influence of the number of turns on spin mixing and motional narrowing. a Singlet probability as a function of the number of turns N t for different time per turn 3τr at B = 90 mT. The blue, red, orange and purple curves correspond, respectively, to 5, 10, 18 and 25 nanoseconds per turn. The fast decay associated to the static phase is observed for small number of turns. The data after the static phase are fitted with an exponential decay with a characteristic number of turns N Decay. Inset: Extracted N Decay as a function of 3τ r. The solid line is a constant fit to the data, which slightly depends on the gate voltage configuration (see Supplementary Note 6). b Singlet probability as a function τ s for N t equal to one and obtained by increasing τ r (electron displacement with minimized transfer phase) at B = 90 mT. The corresponding singlet probability as a function of τ s, where the electrons are static in the (0, 1, 1) charge configuration at 90 mT is plotted in orange for comparison. The data are fitted with a Gaussian decay with a characteristic time T 2 * equal to 16.4 ± 0.9 ns (9.4 ± 0.4 ns) for the blue (orange) curve. All the data presented in this figure are in a tunnelling condition slightly different than Figs. 2, 3 and 5 (see Supplementary Note 6 and Supplementary Fig. 6)
