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

页码：3119 / 3123

页数：5

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