Hydrogen and helium are the most abundant elements in the Universe. They are also, in
principle, the most simple. Nonetheless, they display remarkable properties under extreme …

The study of structure, thermodynamic state, equation of state (EOS) and transport properties
of warm dense matter (WDM) has become one of the key aspects of laboratory astrophysics …

Producing metallic hydrogen has been a great challenge in condensed matter physics.
Metallic hydrogen may be a room-temperature superconductor and metastable when the …

Eighty years ago, it was proposed that solid hydrogen would become metallic at sufficiently
high density. Despite numerous investigations, this transition has not yet been …

Dense fluid metallic hydrogen occupies the interiors of Jupiter, Saturn, and many extrasolar
planets, where pressures reach millions of atmospheres. Planetary structure models must …

Using quantum simulation techniques based on either density functional theory or quantum
Monte Carlo, we find clear evidence of a first-order transition in liquid hydrogen, between a …

The metallization of high-pressure hydrogen, together with the associated molecular to
atomic transition, is one of the most important problems in the field of high-pressure physics …

Using first-principles molecular dynamics, we study the influence of nuclear quantum effects
(NQEs) and nonlocal exchange-correlation density functionals (DFs) near molecular …

The insulator-metal transition in hydrogen is one of the most outstanding problems in
condensed-matter physics. The high-pressure metallic phase is now predicted to be liquid …

A theoretical study is reported of the molecular-to-atomic transition in solid hydrogen at high
pressure. We use the diffusion quantum Monte Carlo method to calculate the static lattice …