PERTURBATION APPROACH FOR THE LOCALIZATION TRANSITION IN THE DISSIPATIVE 2-STATE SYSTEM

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	PERTURBATION APPROACH FOR THE LOCALIZATION TRANSITION IN THE DISSIPATIVE 2-STATE SYSTEM
	ZHANG, GM ; CHEN, H ; WU, X
通讯作者	ZHANG, GM()
	1993
发表期刊	COMMUNICATIONS IN THEORETICAL PHYSICS
ISSN	0253-6102
卷号	19 期号:2 页码:139-144
摘要	Analysis of a dissipative two-state system at zero temperature shows that the model Hamiltonian may be exactly reduced to a modified quantum sine-Gordon model, which describes the effective interactions between the low-frequency phonons under coupling with a tunneling system. Directly considering the infrared divergence encountered in the conventional perturbation treatment, we have developed a new perturbation approach for the effective Hamiltonian, and derived the exact critical conditions for the localization transition. In the critical regime, a gap will be opened near zero momentum in the elementary excitation spectrum of the low-frequency phonons, and the corresponding ground state wave function is found to be a pairing quasi-particle state, analogous to the BCS superconducting state.
收录类别	SCI
语种	英语
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
WOS记录号	WOS:A1993LG50100002
出版者	HUAZHONG UNIV SCI TECH PRESS
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/126417
专题	中国科学院金属研究所
通讯作者	ZHANG, GM
作者单位	1.CCAST,WORLD LAB,CTR THEORET PHYS,BEIJING 100080,PEOPLES R CHINA 2.CHINESE ACAD SCI,INT CTR MAT PHYS,SHANGHAI,PEOPLES R CHINA
推荐引用方式 GB/T 7714	ZHANG, GM,CHEN, H,WU, X. PERTURBATION APPROACH FOR THE LOCALIZATION TRANSITION IN THE DISSIPATIVE 2-STATE SYSTEM[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,1993,19(2):139-144.
APA	ZHANG, GM,CHEN, H,&WU, X.(1993).PERTURBATION APPROACH FOR THE LOCALIZATION TRANSITION IN THE DISSIPATIVE 2-STATE SYSTEM.COMMUNICATIONS IN THEORETICAL PHYSICS,19(2),139-144.
MLA	ZHANG, GM,et al."PERTURBATION APPROACH FOR THE LOCALIZATION TRANSITION IN THE DISSIPATIVE 2-STATE SYSTEM".COMMUNICATIONS IN THEORETICAL PHYSICS 19.2(1993):139-144.