Extended Data Fig. 3: Decoherence dominated by spin-spin interactions in spin-echo measurements.
From: Quantum thermalization and Floquet engineering in a spin ensemble with a clock transition
a, Normalized coherence decay of the spin ensemble as a function of evolution time in the spin-echo sequence. The early-time decay within 1 μs accelerates with increasing J, achieved by increasing the driving amplitude on the F transition during state initialization. Error bars represent the standard deviation of the experimental measurements (see Methods for details), while the solid lines are simple exponential fits used to extract the 1/e decoherence times. b, The fitted decoherence times monotonically decrease with increasing drive amplitude on the F transition, implying that a larger population within the qubit manifold leads to stronger spin-spin interactions and thus faster decoherence.
