Precise variational tunneling rates for anharmonic oscillator with g<0

Details Precise variational tunneling rates for anharmonic oscillator with g<0 Precise variational tunneling rates for anharmonic oscillator with g<0

1995-04-08

arxiv.org/abs/hep-th/9504048v1

Phys.Lett. A187 (1994) 133

Physics

High Energy Physics

High Energy Physics - Theory

PostScript

Scientific paper

10.1016/0375-9601(94)90050-7

We systematically improve the recent variational calculation of the imaginary part of the ground state energy of the quartic anharmonic oscillator. The results are extremely accurate as demonstrated by deriving, from the calculated imaginary part, all perturbation coefficients via a dispersion relation and reproducing the exact values with a relative error of less than $10^{-5}$. A comparison is also made with results of a Schr\"{o}dinger calculation based on the complex rotation method.

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