SYSTEMATIC CORRECTIONS TO THE VARIATIONAL CALCULATION OF THE EFFECTIVE CLASSICAL POTENTIAL

被引：87

作者：

KLEINERT, H

机构：

[1] Institut für Theoretische Physik, Freie Universität Berlin, W-1000 Berlin 33

来源：

PHYSICS LETTERS A | 1993年 / 173卷 / 4-5期

关键词：

D O I：

10.1016/0375-9601(93)90246-V

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show how the Feynman-Kleinert approximation to path integrals (which is based on a locally harmonic variational ansatz and the Jensen-Peierls inequality) can be improved systematically towards the exact result by means of two different methods. One of them leads, even at the lowest correction level, to a great accuracy for any coupling strength including the strong-coupling limit.

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页码：332 / 342

页数：11

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