If you’re interested in the theory of phase transitions, Landau theory (https://en.m.wikipedia.org/wiki/Landau_theory https://en.m.wikipedia.org/wiki/Landau_the

If you’re interested in the theory of phase transitions, Landau theory (https://en.m.wikipedia.org/wiki/Landau_theory https://en.m.wikipedia.org/wiki/Landau_theory) is a good on-ramp. We know the glass transition isn’t a true phase transition because we do not observe a discontinuity in (derivatives of) the free energy at Tg, the glass transition temperature. What results like this suggest is that in some sense the glass transition asymptotically approaches a true phase transition, which is fascinating.