Diffusion Monte Carlo calculations on the adsorption of 4He in open-ended single walled (10,10) nanotubes are presented. We have found a first order phase transition separating a low density liquid phase in which all 4He atoms are adsorbed close to the tube wall and a high density arrangement characterized by two helium concentric layers. The energy correction due to the presence of neighboring tubes in a bundle has also been calculated, finding it negligible in the density range considered.
@article{arxiv.0711.1335,
title = {4He adsorbed inside (10,10) single walled carbon nanotubes},
author = {M. C. Gordillo and J. Boronat and J. Casulleras},
journal= {arXiv preprint arXiv:0711.1335},
year = {2009}
}