Fig. 2
From: An equation-of-state-meter of quantum chromodynamics transition from deep learning
Importance maps of the particle momentum distribution. The values in the scale bar represent the relative importance of each bin for classification computed using the Prediction Difference Analysis method by averaging over about 800 events for each category. EOSL in the first row represents the equation of state with a smooth crossover, EOSQ in the second row represents a first-order phase transition equation of state. The G1 in a–d represents the testing data set Group 1 from iEBE-VISHNU model while G2 in e–h represents the testing data set from CLVisc + IP-Glasma model. The η/s = 0 in a, b, e, f represents ideal hydrodynamics while η/s = 0.08 in c, d, g, h represents viscous hydrodynamics with shear viscosity over entropy density ratio 0.08
