Abstract
The equation of state of warm dense ethane is obtained using quantum molecular dynamics simulations based on finite-temperature density functional theory for densities from 0.1 g/cm3 to 3.1 g/cm3 and temperatures from 0.1 eV to 5.17 eV. The calculated pressure and internal energy are fitted with cubic polynomials in terms of density and temperature. Specific density-temperature-pressure tracks such as the principal and double shock Hugoniot curves along with release isentropes are predicted which are fundamental for the analysis and interpretation of high-pressure experiments. The principal and double shock Hugoniot curves are in agreement with the experimental data from the Sandia Z-Machine [Magyar et al., Phys. Rev. B 91, 134109 (2015)].
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