PIMC Simulations of Metal Hydrogen: Phase Transition and Equation of State

TL;DR

This paper uses PIMC simulations to study atomic hydrogen, focusing on phase transitions and equations of state at conditions where quantum effects are significant for electrons.

Contribution

It provides new numerical data on phase transitions and equations of state for metal hydrogen using PIMC, emphasizing quantum effects on electrons.

Findings

Identification of phase transition between solid and liquid hydrogen.

Dependence of internal energy and pressure on temperature and density.

Quantum effects are crucial for electrons in the studied range.

Abstract

The article is devoted to numerical studies of atomic (metal) hydrogen with Path Integral Monte Carlo (PIMC) technique. The research is focused on the range of temperatures and densities where quantum statistics effects are crucial for electrons and negligible for protons. In this range the equations of state are obtained as a dependence of internal energy and pressure on temperature and density. These dependences allow to detect and describe the phase transition between solid and liquid phases.