HIGHLIGHTS
SUMMARY
It came therefore to the present authors as a surprise when in a recent study of dissipative expansion trajectories, where viscous heating leads to an increase of entropy with time, for some initial conditions in the quark-gluon plasma phase the chemical potential μB did not initially decrease, but rather grew with decreasing temperature. The authors point out that the above phenomenon of decreasing equilibrium entropy is associated with more rapid cooling along the expansion trajectory than expected for adiabatic expansion. The authors explain how, for certain types of far-off-equilibrium initial conditions . . .
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