The quartic oscillator: a non-perturbative study by continuous unitary transformations

被引：27

作者：

Dusuel, S

Uhrig, GS

机构：

[1] Univ Cologne, Inst Theoret Phys, D-50937 Cologne, Germany

[2] Tohoku Univ, Dept Phys, Sendai, Miyagi 9808578, Japan

[3] Ecole Normale Super Lyon, CNRS, UMR 5672, Phys Lab, F-69364 Lyon, France

来源：

JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL | 2004年 / 37卷 / 39期

关键词：

D O I：

10.1088/0305-4470/37/39/014

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The quantum quartic oscillator is investigated in order to test the many-body technique of the continuous unitary transformations. The quartic oscillator is sufficiently simple to allow a detailed study and comparison of various approximation schemes. Due to its simplicity, it can be used as a pedagogical introduction to the unitary transformations. Both the spectrum and the spectral weights are discussed.

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页码：9275 / 9294

页数：20

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