No Spin-Localization Phase Transition in the Spin-Boson Model without Local Field
文献类型：期刊论文
| 作者 | Liu Tao1,2; Feng Mang1; Li Lei1,2; Yang Wan-Li1; Wang Ke-Lin3 |
| 刊名 | COMMUNICATIONS IN THEORETICAL PHYSICS
 |
| 出版日期 | 2013-12-01 |
| 卷号 | 60期号:6页码:637-641 |
| 关键词 | spin-boson model localization phase transition parity breaking |
| 英文摘要 | We explore the spin-boson model in a special case, i.e., with zero local field. In contrast to previous studies, we find no possibility for quantum phase transition (QPT) happening between the localized and delocalized phases, and the behavior of the model can be fully characterized by the even or odd parity as well as the parity breaking, instead of the QPT, owned by the ground state of the system. The parity breaking mentioned in our case is completely different from the spontaneously broken symmetry relevant to the conventionally defined QPT in previous studies. Our analytical treatment about the eigensolution of the ground state of the model presents for the first time a rigorous proof of no-degeneracy for the ground state of the model, which is independent of the bath type, the degrees of freedom of the bath and the calculation precision. We argue that the QPT mentioned previously appears due to incorrect employment of the ground state of the model and/or unreasonable treatment of the infrared divergence existing in the spectral functions for Ohmic and sub-Ohmic dissipations. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Physics, Multidisciplinary |
| 研究领域[WOS] | Physics |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000330882300001 |
| 公开日期 | 2016-05-09 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/875]  |
| 专题 | 武汉物理与数学研究所_原子分子光物理研究部 |
| 作者单位 | 1.Chinese Acad Sci, Wuhan Inst Phys & Math, State Key Lab Magnet Resonance & Atom & Mol Phys, Wuhan 430071, Peoples R China 2.Southwest Univ Sci & Technol, Sch Sci, Mianyang 621010, Peoples R China 3.Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu Tao,Feng Mang,Li Lei,et al. No Spin-Localization Phase Transition in the Spin-Boson Model without Local Field[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2013,60(6):637-641. |
| APA | Liu Tao,Feng Mang,Li Lei,Yang Wan-Li,&Wang Ke-Lin.(2013).No Spin-Localization Phase Transition in the Spin-Boson Model without Local Field.COMMUNICATIONS IN THEORETICAL PHYSICS,60(6),637-641. |
| MLA | Liu Tao,et al."No Spin-Localization Phase Transition in the Spin-Boson Model without Local Field".COMMUNICATIONS IN THEORETICAL PHYSICS 60.6(2013):637-641. |
入库方式： OAI收割
来源：武汉物理与数学研究所
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