title: Vibrational levels of Ar4: new odd-parity bosonic states.
abstract: Vibrational levels of Ar4 are computed using the Lanczos algorithm and a large basis set. We find both even- and odd-parity states with wave functions that are invariant with respect to permutations of the Ar atoms. The odd-parity bosonic levels have not been computed previously. The even-parity levels are close to those obtained using the correlation-function Monte Carlo method (CFMC).
authors: Département de chimie, Université de Montréal, C.P. 6128, succursale Centre-ville, Montréal (Québec) H3C 3J7, Canada. Xiaogang.Wang@umontreal.ca
authors: Xiao-Gang
authors: XG
authors: Wang
authors: Tucker
authors: T
authors: Carrington