Date of Original Version
A quantum Monte Carlo method is introduced to optimize excited-state trial wave functions. The method is applied in a correlation function Monte Carlo calculation to compute ground- and excited-state energies of bosonic van der Waals clusters of up to seven particles. The calculations are performed using trial wave functions with general three-body correlations.
Nightingale, M. P., & Melik-Alaverdian, V. (2001). Optimization of Ground- and Excited-State Wave Functions and van der Waals Clusters. Phys. Rev. Lett., 87(4), 0434041. doi: 10.1103/PhysRevLett.87.043401
Available at: https://doi.org/10.1103/PhysRevLett.87.043401