Rayleigh-Schrödinger Perturbation Theory Based on Gaussian Wavefunctional Approch

Details Rayleigh-Schrödinger Perturbation Theory Based on Gaussian Wavefunctional Approch Rayleigh-Schrödinger Perturbation Theory Based on Gaussian Wavefunctional Approch

2001-01-16

arxiv.org/abs/hep-th/0101103v1

Phys.Rev. D64 (2001) 025006; Erratum-ibid. D66 (2002) 069901

Physics

High Energy Physics

High Energy Physics - Theory

revtex, 7 pages, no figures

Scientific paper

10.1103/PhysRevD.64.025006

A Rayleigh-Schr\"{o}dinger 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 $\lambda\phi^4$ field theory.

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