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UNIVERSALITY OF DISSIPATIVE 2-STATE SYSTEMS
HONG, C; LU, Y; HONG, C , INT CTR THEORET PHYS,STRADA COSTIERA 11,I-34014 TRIESTE,ITALY.
1992
发表期刊PHYSICAL REVIEW B
ISSN0163-1829
卷号45期号:23页码:13753-13756
摘要The static properties of a dissipative two-state system are studied by perturbation, mapping to the quantum sine-Gordon model, and a variational approach. We find that its properties at zero temperature depend not only on the spectral density J(omega) is similar to SIGMA(l)g(l)2-delta(omega-omega(l)), but also on the explicit form of the coupling strength g(l) is similar omega(l)lambda (omega(l) is the phonon frequency). For weak coupling (lambda greater-than-or equal-to 1), the effect of displacement of the phonon state is dominant; while for strong coupling (lambda greater-than-or-equal-to 1), one must take account of both displacement and deformation. Displaced squeezed states are proposed as ground states of the bath under strong coupling, and we show that the localization transition of the Ohmic dissipation occurs at alpha(c) = 3 - 2-lambda instead of alpha(c) = 1 as for the weak-coupling case.
部门归属TONG JI UNIV,POHL INST SOLID STATE PHYS,SHANGHAI 200092,PEOPLES R CHINA; CHINESE ACAD SCI,INST THEORET PHYS,BEIJING 100080,PEOPLES R CHINA
关键词Squeezed-state Approach Tunneling Systems Instanton Approach Zero Temperature Model Dynamics Phonons Transition Junctions
学科领域Physics
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收录类别SCI
WOS记录号WOS:A1992HZ24500079
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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.itp.ac.cn/handle/311006/12155
专题理论物理所1978-2010年知识产出
通讯作者HONG, C , INT CTR THEORET PHYS,STRADA COSTIERA 11,I-34014 TRIESTE,ITALY.
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HONG, C,LU, Y,HONG, C , INT CTR THEORET PHYS,STRADA COSTIERA 11,I-34014 TRIESTE,ITALY.. UNIVERSALITY OF DISSIPATIVE 2-STATE SYSTEMS[J]. PHYSICAL REVIEW B,1992,45(23):13753-13756.
APA HONG, C,LU, Y,&HONG, C , INT CTR THEORET PHYS,STRADA COSTIERA 11,I-34014 TRIESTE,ITALY..(1992).UNIVERSALITY OF DISSIPATIVE 2-STATE SYSTEMS.PHYSICAL REVIEW B,45(23),13753-13756.
MLA HONG, C,et al."UNIVERSALITY OF DISSIPATIVE 2-STATE SYSTEMS".PHYSICAL REVIEW B 45.23(1992):13753-13756.
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