Fig. 1. Sketch of probing QCD phase transitions with light nuclei production in heavy-ion collisions QCD phase diagram on the left is taken from Ref.[24]

Fig. 2. Dependence of the function G(ξ/σ) on the correlation lengthξ withσ being the width parameter in the deuteron or triton Wigner function^[42]

Fig. 3. Quark matter phase diagram in the temperature and the net-quark density plane from the three-flavor NJL model(gV=0) with equal chemical potential for u and d quarks and zero chemical potential for s quarks^[54]

Fig. 4. Quark matter phase diagram in the temperature and net-quark density plane from the three-flavor NJL model (a), quark matter density at t=0 fm∙c^-1 (b) and 100 fm∙c^-1 (c)^[54]

Fig. 5. Time dependence of the second-order scaled density moment and temperature difference

Fig. 6. Evolution of the distribution of net-baryon number density in fm^-3 and the second-order scaled density moment y2 in the transverse planez=0 in the partonic phase (a~d) and the hadronic phase (e~h) for the case ofgV=0^[54]

Fig. 7. Evolution of the distribution of net-baryon number density in fm^-3 and the second-order scaled density moment y2 in the transverse planez=0 in the partonic phase (a~d) and the hadronic phase (e~h) for the case ofgV=GS^[54]

Fig. 8. Time dependence of the second-order scaled moment y₂ of net-baryon density for the two cases of g_V=0, with a first-order chiral phase transition (solid line) and g_V=G_S with a smooth crossover (dash-dotted line)^[54]

Fig. 9. Evolution of phase trajectory in the phase diagram for gV=0 with a first-order chiral phase transition (solid circles) andgV=GS with a smooth crossover (solid stars)^[54]

Fig. 10. Yield ratio NtNp/Nd2 of proton (p), deuteron (d), and triton (t) for the cases ofgV=0 with a first-order phase transition (solid star) as well asgV=GS andgV=2GS with a crossover transition (circles)^[54]