Fig. 2: Robustness simulations of the double-channel PulsePol.

a Polarization transfer to a single electron spin under perfect conditions (black dashed line) and under pulse errors (orange crosses) that include a detuning error Δ_NV = (2π)2.5 MHz in the driving field of the nitrogen-vacancy (NV) spin and Rabi frequency errors Ω_error = (2π)1.2 MHz in both driving fields. The NV-electron coupling is \({{{{{{{{\mathcal{A}}}}}}}}}_{{{{{{{{\rm{zz}}}}}}}}}=(2\pi )\)0.4 MHz and the Rabi frequency Ω = (2π)20 MHz. b Polarization transfer to a ¹H nucleus using an electron as mediator under perfect conditions (black dashed line) and under the same pulse errors and parameters as in (a) (green triangles). The NV-electron and the electron-nuclear couplings are \({{{{{{{{\mathcal{A}}}}}}}}}_{{{{{{{{\rm{zz}}}}}}}}}=\alpha {{{{{{{{\mathcal{B}}}}}}}}}_{\perp }=(2\pi )0.1\)MHz. c, d For the same parameters as (a, b), maximum polarization transfer versus Δ_NV and Ω_error. The color bars represent the polarization acquired by the target particle, quantified by 2〈E_z〉 and 2〈I_z〉, respectively, being −1 the maximum attainable polarization.