Instantons and phase transition in quantum interference
文献类型：期刊论文
| 作者 | Si, TY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; Si, TY |
| 刊名 | JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL
 |
| 出版日期 | 2006 |
| 卷号 | 39期号:3页码:637-647 |
| 关键词 | Biaxial Spin Model Magnetization Coherence Particles |
| ISSN号 | 0305-4470 |
| 英文摘要 | In the biaxial nanospin system, quantum tunnelling of the magnetization vector oscillates with increasing magnetic field or temperature. When the number of instanons is equal to the number of anti-instantons, the annihilation of instanton-anti-instanton pair results,in a vanished Berry curvature, it leads to the topological quenching point. When the number of instantons and anti-instantons is not equal, berry curvature is nonzero, this suggests that there are extra instantons that revive the tunnelling splitting. So the generation (annihilation) of instanton induced the revival (quenching) of tunnel splitting. This generation or annihilation is accompanied by different phase transitions which can be distinguished by H/H-c/1-K-2/K-1. When the system slides from the phase of H/H-c < 1-K-2/K-1 into the phase of H/H-c > 1-K-2/K-1, an instanton will be generated (annihilated), which revives (quenches) the quantum tunnelling. This conclusion also holds when phase transition occurs in the opposite direction, i.e., from H/H-c > 1-K-2/K-1 to H/H-c < 1-K-2/K-1. So there is a phase transition that occurs alternatively in the magnetic molecule system when the topological quenching of the tunnel splitting occurs quasiperiodically. |
| 学科主题 | Physics |
| URL标识 | 查看原文 |
| WOS记录号 | WOS:000235712000015 |
| 公开日期 | 2012-08-02 |
| 源URL | [http://ir.itp.ac.cn/handle/311006/6055]  |
| 专题 | 理论物理研究所_理论物理所1978-2010年知识产出 |
| 通讯作者 | Si, TY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China |
| 推荐引用方式 GB/T 7714 | Si, TY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China,Si, TY. Instantons and phase transition in quantum interference[J]. JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL,2006,39(3):637-647. |
| APA | Si, TY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China,&Si, TY.(2006).Instantons and phase transition in quantum interference.JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL,39(3),637-647. |
| MLA | Si, TY , Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China,et al."Instantons and phase transition in quantum interference".JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL 39.3(2006):637-647. |
入库方式： OAI收割
来源：理论物理研究所
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