Fig. 1
From: Exact broadband excitation of two-level systems by mapping spins to springs
Exact excitation of single spins. a The minimum-energy control u* π/2 steering the spring from X 0 = (0,0) to X π/2 = (π/2,0), with b the corresponding trajectories of the spring (red) and spin (black) for ω = 3 and T = π
