Path-integral Monte Carlo simulations of solid neon at room temperature

The kinetic and potential energies and the pressure of solid neon at room t emperature have been calculated by means of path-integral Monte Carlo simul ations using the HFD-C2 pair potential. At these high densities, the quantu m corrections to the kinetic energy are appreciable, but for the potential energy and pressure classical simulations (even with a nearest-neighbor mod el) are generally within 1 % of the quantum-mechanical values. The present results for the pressure are significantly higher than the experimental equ ation of state in the 10-100-GPa range. It is shown that inclusion of many- body short-range interactions might bring the simulations in agreement with experiment.