Fig. 1. (a) Physical model of system; (b) simulation points on phase diagram with Widom line, liquid-like and gas-like region.

Fig. 2. (a) The curve of c_punder different pressures; (b) the curve of k_Tunder different pressures.

Fig. 3. Radial distribution function: (a) P = 1.1P_c; (b) P = 1.3P_c; (c) P = 1.5P_c; (d) P = 2.0P_c.

Fig. 4. Coordination number: (a) P = 1.1P_c; (b) P = 1.3P_c; (c) P = 1.5P_c; (d) P = 2.0P_c.

Fig. 5. The slope of coordination number curve.

Fig. 6. Liqud atoms evolution over the xy plane with different pressure: (a) P = 1.1P_c, T = T_pc; (b) P = 2.0P_c, T = T_pc.

Fig. 7. The ratio of high/low density region at pseudo-critical point temperature under different pressure: (a) The ratio of high density region; (b) the ratio of low density region.

Fig. 8. Static structure fator: (a) P = 1.1P_c; (b) P = 1.3P_c; (c) P = 1.5P_c; (d) P = 2.0P_c.

Fig. 9. (a) Time series of density for T = T_pc; (b) permutation entropy.