Anomalous Heat Conduction in One-Dimensional Quantum Fermi-Pasta-Ulam Lattice: Semiquantal Approach
文献类型：期刊论文
| 作者 | Hu, Tao1; Tang, Yi |
| 刊名 | JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
 |
| 出版日期 | 2010-06-01 |
| 卷号 | 79页码:7 |
| 关键词 | heat conduction thermal transport semiquantal approach nonlinear lattices |
| ISSN号 | 0031-9015 |
| DOI | 10.1143/JPSJ.79.064601 |
| 英文摘要 | We investigate the mechanism of heat conduction in one-dimensional (1D) quantum FPU chain with quantum fluctuation in the framework of semiquantal molecular dynamics. In the semiquantal many-body simulations, a Hartree-type many-body wave function is adopted for a whole chain and a single-particle state of a particle is represented by a trial wave function with Jackiw-Kerman (JK) form. With the help of the Dirac's time-dependent variational principle (TDVP), a set of equations of the variational parameters contained in the JK wave packet is obtained, and it describes the quantum dynamics of the nonlinear lattices approximately. These equations not only prove highly efficient in recovering dynamics of classical heat conduction, but also allow exploring the case with quantum mechanical characteristics. As a consequence, we find the thermal conductivity diverges with system size as well as in the classical version when considering quantum fluctuation. Furthermore, in three different temperature regions it is observed that the enhancement of the quantum fluctuation increases the heat flux through the 1D quantum FPU chain. |
| WOS关键词 | FRENKEL-KONTOROVA MODEL ; WAVE-PACKET DYNAMICS ; THERMAL-CONDUCTIVITY ; MOLECULAR-DYNAMICS ; CARBON NANOTUBES ; STATE ; SYSTEM ; APPROXIMATION ; CHAOS |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000278513100011 |
| 出版者 | PHYSICAL SOC JAPAN |
| 源URL | [http://119.78.100.186/handle/113462/32461]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Hu, Tao |
| 作者单位 | 1.Xiangtan Univ, Dept Phys, Xiangtan 411105, Hunan, Peoples R China 2.Xiangtan Univ, Inst Modern Phys, Xiangtan 411105, Hunan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Tao,Tang, Yi. Anomalous Heat Conduction in One-Dimensional Quantum Fermi-Pasta-Ulam Lattice: Semiquantal Approach[J]. JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN,2010,79:7. |
| APA | Hu, Tao,&Tang, Yi.(2010).Anomalous Heat Conduction in One-Dimensional Quantum Fermi-Pasta-Ulam Lattice: Semiquantal Approach.JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN,79,7. |
| MLA | Hu, Tao,et al."Anomalous Heat Conduction in One-Dimensional Quantum Fermi-Pasta-Ulam Lattice: Semiquantal Approach".JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 79(2010):7. |
入库方式： OAI收割
来源：近代物理研究所
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