Variational perturbation theory for density matrices

被引：23

作者：

Bachmann, M ^{[1
]}

Kleinert, H ^{[1
]}

Pelster, A ^{[1
]}

机构：

[1] Free Univ Berlin, Inst Theoret Phys, D-14195 Berlin, Germany

来源：

PHYSICAL REVIEW A | 1999年 / 60卷 / 05期

关键词：

D O I：

10.1103/PhysRevA.60.3429

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We develop a convergent variational perturbation theory for quantum-statistical density matrices which is applicable to polynomial as well as nonpolynomial interactions. We illustrate the power of the theory by calculating the temperature-dependent density of a particle in the double-well potential to second order, and of the electron in the hydrogen atom to first order. [S1050-2947(99)08410-3].

引用

页码：3429 / 3443

页数：15

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