# Search results for: Rafael Guardiola

International Journal of Quantum Chemistry > 111 > 2 > 463 - 471

_{2})

_{N}clusters is presented. The clusters are viewed as a set of

*N*structureless p‐H

_{2}molecules, interacting via an isotropic pairwise potential. Properties as superfluidity, magic numbers, radial structure, excitation spectra, and abundance production of (p‐H

_{2})

_{N}clusters are discussed and, whenever possible, a comparison with...

Open Physics > 2008 > 6 > 1 > 33-37

Open Physics > 2008 > 6 > 1 > 33-37

Central European Journal of Physics > 2008 > 6 > 1 > 33-37

*p*-H

_{2}-

*p*-H

_{2}interactions. The improvement is due to three-body correlations in the importance sampling, to the time step adjustment and to a better estimation of statistical errors. In contrast to path-integral Monte...

Journal of Low Temperature Physics > 2007 > 148 > 5-6 > 857-861

_{2})

_{ N }clusters with

*N*=3–50 molecules, with the aim of finding signals of magic sizes and discerning the cluster structure. The analysis of the calculated chemical potential as a function of

*N*provides a definitive confirmation of the magic size

*N*=13. The calculations show that...

Journal of Low Temperature Physics > 2006 > 142 > 1-2 > 1-81

^{3}He and mixed

^{3}He−

^{4}He droplets, vortices in droplets and droplets on weakly attractive substrates, and in others that have not been previously reviewed in detail. Whenever possible, we compare results from different theoretical methods, with the aim of assessing the...

Journal of Low Temperature Physics > 2005 > 138 > 1-2 > 235-240

^{4}He clusters with less than N = 50 atoms have been calculated by the diffusion Monte Carlo method. The deviations of the excitation energy levels from predictions based on a simple liquid drop model are explained by the width of the density fall-off at the cluster surface and the size dependence of the surface tension.