Excited states of4Hedroplets

R. Guardiola, J. Navarro, M. Portesi
2001 Physical Review B (Condensed Matter)  
We study low-lying excited states of 4 He clusters up to a cluster size of 40 atoms in a variational framework. The ansatz wave function combines two-and three-body correlations, coming from a translationally invariant configuration interaction description, and Jastrow-type short-range correlation. We have previously used this scheme to determine the ground-state energies of 4 He and 3 He clusters. Here we present an extension of this ansatz wave function having a good quantum angular momentum
more » ... m angular momentum L. The variational procedure is applied independently to the cases with Lϭ0,2,4, and upper bounds for the corresponding energies are thus obtained. Moreover, centroid energies for L excitations are calculated through the use of sum rules. A comparison with previous calculations is also made.
doi:10.1103/physrevb.63.224519 fatcat:vvhpvjhatjdb7lzk2zttlbphei