Fig. 2
From: Non-Markovianity-assisted high-fidelity Deutsch–Jozsa algorithm in diamond

a Pulse sequences used to characterize the non-Markovianity of the spin environment. b The trace distance of the two optimal states shows the non-Markovianity of the spin environment with revivals. The red dots represent the experimental results of the trace distance evolution and the blue solid line denotes the fitting obtained with the supposed model