  Correlations in interacting many-body systems are key to the study of quantum
materials and quantum information. More often than not, the complexity of the
correlations grows quickly as the system evolves and thus presents a challenge
for experimental characterization and intuitive understanding. In a strongly
driven Bose-Einstein condensate, we observe the high harmonic generation of
matter-wave jets with complex correlations as a result of bosonic stimulation.
Based on a pattern recognition scheme, we identify a universal pattern of
correlations which offers essential clues to unveiling the underlying secondary
scattering processes and high-order correlations. We show that the pattern
recognition offers a versatile strategy to visualize and analyze the quantum
dynamics of a many-body system.
