Figure 5
From: Role of flow of information in the speedup of quantum evolution
The instantaneous speed V (dashed line) and the absolute value of information changing rate \(\Re =|\sigma (t,{\rho }_{\mathrm{1,2}}(0))|\) (solid line) as a function of Γt for (a) ϕ = 0, (b) ϕ = π/2 and (c) ϕ = π with Γtd = 2, Ω = 0 and Δ = 0.
