title: Use of correlated potential harmonic basis functions for the description of the 4He trimer and small clusters.
abstract: A correlated many-body basis function is used to describe the (4)He trimer and small helium clusters ((4)He(N)) with N = 4-9. A realistic helium dimer potential is adopted. The ground state results of the (4)He dimer and trimer are in close agreement with earlier findings. But no evidence is found for the existence of Efimov state in the trimer for the actual (4)He-(4)He interaction. However, decreasing the potential strength we calculate several excited states of the trimer which exhibit Efimov character. We also solve for excited state energies of these clusters which are in good agreement with Monte Carlo hyperspherical description.
authors.affiliation: Department of Physics, University of Calcutta, 92 A.P.C. Road, Kolkata 700009, India.
authors.forename: Tapan Kumar
authors.initials: TK
authors.lastname: Das
authors.forename: Barnali
authors.initials: B
authors.lastname: Chakrabarti
authors.forename: Sylvio
authors.initials: S
authors.lastname: Canuto