Extended Data Fig. 2: Hahn echo decay of Q2.
From: Sweet-spot operation of a germanium hole spin qubit with highly anisotropic noise sensitivity
a, Hahn echo decay of Q2, for the magnetic field aligned with the hyperfine sweet plane. Solid line is a fit to the data used to extract \({T}_{2}^{\,{\rm{H}}}\). b, Hahn echo decay of Q2, for the magnetic field aligned away from the hyperfine sweet plane. A collapse-and-revival structure can be observed due to the interaction of the qubit with the precession of the 73Ge nuclear spins. Solid line is a fit to the data used to extract \({T}_{2}^{\,{\rm{H}}}\).
