Flow equation renormalization of a spin-boson model with a structured bath

被引：0
|
作者：
Kleff, S
Kehrein, S
von Delft, J
机构：
[1] Univ Munich, Lehrstuhl Theoret Festkorperphys, D-80333 Munich, Germany
[2] Univ Augsburg, D-86135 Augsburg, Germany
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2003年 / 18卷 / 1-3期
关键词：
flow equations; quantum dissipative systems; spin-boson; structured bath;
D O I：
10.1016/S1386-9477(02)01083-4
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
We discuss the dynamics of a spin coupled to a damped harmonic oscillator. This system can be mapped to a spin-boson model with a structured bath, i.e. the spectral function of the bath has a resonance peak. We diagonalize the model by means of infinitesimal unitary transformations (,flow equations), thereby decoupling the small quantum system from its environment, and calculate spin-spin correlation functions. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：343 / 345
页数：3
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