Figure 3
From: Purification of an unpolarized spin ensemble into entangled singlet pairs
(a) The coherence of the central spin is plotted as a function of time for three different initial states of the spin-bath. (b) The central spin transition conditioned on its coupling to three different nuclear spin species that have Larmor frequencies ω, ω 1 = ω + ε, ω 1 = ω − ε (we chose ε = ω/10) is shown as a function of the interrogating time τ, for three different initial states of the strongly interacting spin-bath (ω). Clearly, when the spin bath is initialized into the singlet paired state, the two farther nuclear spins are well resolved. The inset displays the spin configuration with different spin species.
