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.
引用
收藏
页码：9275 / 9294
页数：20
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