Quantum Monte Carlo simulation of spin-polarized H

Details Quantum Monte Carlo simulation of spin-polarized H Quantum Monte Carlo simulation of spin-polarized H

2007-02-19

arxiv.org/abs/cond-mat/0702442v1

Physics

Condensed Matter

Other Condensed Matter

9 pages, accepted for publication in Phys. Rev. B

Scientific paper

The ground-state properties of spin polarized hydrogen H$\downarrow$ are obtained by means of diffusion Monte Carlo calculations. Using the most accurate to date ab initio H$\downarrow$-H$\downarrow$ interatomic potential we have studied its gas phase, from the very dilute regime until densities above its freezing point. At very small densities, the equation of state of the gas is very well described in terms of the gas parameter $\rho a^3$, with $a$ the s-wave scattering length. The solid phase has also been studied up to high pressures. The gas-solid phase transition occurs at a pressure of 173 bar, a much higher value than suggested by previous approximate descriptions.

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