Erratum: Rayleigh-Schrödinger perturbation theory based on Gaussian wave functional approach [Phys. Rev. D64, 025006 (2001)]

Wen-Fa Lu, Chul Koo Kim, Jae Hyung Yee, Kyun Nahm
2002 Physical Review D, Particles and fields  
A Rayleigh-Schrödinger perturbation theory based on the Gaussian wavefunctional is constructed. The method can be used for calculating the energies of both the vacuum and the excited states. A model calculation is carried out for the vacuum state of the λφ 4 field theory.
doi:10.1103/physrevd.66.069901 fatcat:lnb5k4dqg5e3blqzzose6jtgnu