THE LOCALIZATION TRANSITION IN A DISSIPATIVE 2-STATE SYSTEM - A SQUEEZED STATE APPROACH

被引：12
|
作者：
ZHANG, Y [1 ]
CHEN, H [1 ]
WU, X [1 ]
机构：
[1] ACAD SINICA,CHINESE CTR ADV SCI & TECHNOL,WORLD LAB,INT CTR MAT PHYS,CTR THEORET PHYS,SHENYANG,PEOPLES R CHINA
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 1990年 / 2卷 / 13期
关键词：
D O I：
10.1088/0953-8984/2/13/021
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
A displaced squeezed state is used as the variational ground state of a spin-boson Hamiltonian describing the interaction of a two-state system with a phonon bath. The phase diagram for localisation in the ohmic dissipation is obtained by a method based on the self-consistent calculation of the effective tunnelling splitting. A comparison with the results of the usual displaced state approximation and the renormalisation group theory is also given.
引用
收藏
页码：3119 / 3123
页数：5
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