The application discloses a
quantum state high-fidelity discrimination method and equipment based on
ion automatic positioning, constructs a dynamic closed-loop compensation
system of
ion position updating, effective discrimination region reconstruction and discrimination parameter self-adaptive adjustment, solves the defect that the discrimination fidelity is degraded with time due to imaging drift in multi-
ion quantum state discrimination, and realizes long-term stable and high-fidelity
quantum state discrimination; when the effective discrimination region of the ion is constructed, the
bright spot feature and the
physical property that the ions are arranged to form a linear ion chain in the
ion trap axis direction are utilized, a physical constraint model based on the
ion trap potential field distribution is introduced, and the corresponding relationship between the ion and the
bright spot region is established; the feature parameters of the
point spread function are extracted in real time by using the
bright state average image, a local pixel region highly related to the actual
fluorescence distribution of the ion is adaptively constructed, and the
random noise interference of the background pixel is maximally inhibited, so that the
signal-to-
noise ratio of the multi-ion
quantum state discrimination is fundamentally improved.