IMPROVING THE VARIATIONAL APPROACH TO PATH-INTEGRALS

被引：18

作者：

KLEINERT, H

机构：

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

来源：

PHYSICS LETTERS B | 1992年 / 280卷 / 3-4期

关键词：

D O I：

10.1016/0370-2693(92)90063-A

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We improve the Feynman-Kleinert variational approach to euclidean path integrals rendering it much more powerful in the low-temperature regime. The new power is illustrated by an application to the anharmonic oscillator with a potential V(x) = 1/2m2x2 + 1/4gx4, where it yields not only a better approximation to the low-temperature part of the partition function but delivers, in addition, all bound-state energies uniformly well for any principal quantum number n and coupling constant g.

引用

页码：251 / 260

页数：10

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