Extended Data Fig. 4: NMR datasets.
From: Ideal refocusing of an optically active spin qubit under strong hyperfine interactions
a, Inverse NMR spectrum of nuclear transition frequencies resolved in an extrinsically strained device (\({\nu }_{Q}^{{{{\rm{ext}}}}}=250\) kHz), displaying a sharp central transition (CT) together with broader satellite transitions (ST). b, Inverse NMR lineshape of the blue-detuned satellite transition together with a skew-normal fit (the red solid curve), given by a function S(A)(ν) from Eq. (8) in Methods, with fitted parameters A = 158(1) μeV × kHz, μ(A) = 252.21(4) kHz, σ(A) = 9.74(8) kHz, ζ(A) = 3.22(8) and C = 0.72(3) μeV, corresponding to a FWHM = 22.9(2) kHz. c, Integral NMR spectrum of the blue-detuned satellite transition. The solid red curve displays the normalized cumulative distribution obtained from the fit to the data in Extended Data Fig. 4b (cf. Eq. (10) in Methods); the mismatch indicates the presence of a broader pedestal (see Fig. 4a), which we fit with a Gaussian distribution centred at μ(B) = 246(2) kHz with FWHM = 172(9) kHz and relative weight β = 0.244(7). The resulting sum fit, given by function CDF(ν) from Eq. (11) in Methods (normalized to 13.09 μeV), is displayed as the turquoise solid curve.
