Variational Perturbation Theory for the Ground-State Wave Function

Details Variational Perturbation Theory for the Ground-State Wave Function Variational Perturbation Theory for the Ground-State Wave Function

2001-05-20

arxiv.org/abs/quant-ph/0105095v1

Physics

Quantum Physics

The article is a contribution to the book "Fluctuating Paths and Fields - Dedicated to Hagen Kleinert on the Occasion of His 6

Scientific paper

We evaluate perturbatively the density matrix in the low-temperature limit
and thus the ground-state wave function of the anharmonic oscillator up to
second order in the coupling constant. We then employ Kleinert's variational
perturbation theory to determine the ground-state wave function for all
coupling strengths.

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