The phase diagram shows the state of water (H2O) under very high pressure (X-axis) and temperature conditions (Y-axis). These conditions apply in the interior of the ice planets Uranus and Neptune ...

These reference energies are fed into a machine learning model that is then able to provide realistic simulations of water across the entire phase diagram.

Quasi-elastic neutron scattering experiment: Phase diagram and investigated thermodynamic paths. a: Experimental phase diagram of water in the investigated P-T region.