Fig. 4: Decoherence and dephasing times of the molecular five-electron spin state.
From: Coherent control of a donor-molecule electron spin qubit in silicon
a Hahn spin echo measurement of the five-electron state, plotting the measured spin-up fraction Δp↑ as a function of total free precession time 2τ. b Spin echo envelope measurement with a Ramsey-type pulse sequence. The initial free precession time τ = 3 μs is fixed, and we plot Δp↑ as a function of the relative delay of the final projection pulse δτ. Error bars indicate ±1σ on the spin-up fraction.
