Diffusion Monte Carlo calculations on the adsorption of 4He inside carbon nanotubes arepresented. We focused on the (10,10) ones, in which a ground state liquid phase at lowdensities and pressures around zero. In those calculations, all the carbon atoms whereconsidered individually, both in the trial function and in their contribution to the totalpotential. Comparisons are made with the liquid state of helium inside a (5,5) carbonnanotube.
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