DFT-MD simulations of mixing properties in warm dense plastic

Mixtures of carbon and hydrogen at megabar conditions and at temperatures below one electronvolt can be found in a variety of planets of our solar system like Uranus and Neptune and are believed to feature prominently in extrasolar planets. The equation of state, transport and mixing properties of carbo-hydrates thus strongly influence the inner structure and evolution of these astrophysical objects.
We present results of density-functional molecular dynamics simulations for the structure and mixing properties of carbo-hydrates at such conditions in order to explain recent experimental results showing the demixing of carbon and hydrogen and the formation of nano-diamonds at double shock conditions.