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题名: Non-Gaussian Fluctuations and Non-Markovian Effects in the Nuclear Fusion Process: Langevin Dynamics Emerging from Quantum Molecular Dynamics Simulations
作者: Wen, K ;  Sakata, F ;  Li, ZX ;  Wu, XZ ;  Zhang, YX ;  Zhou, SG
刊名: PHYSICAL REVIEW LETTERS
出版日期: 2013
卷号: 111, 期号:1, 页码:12501
关键词: HEAVY-ION COLLISIONS ;  SUPERHEAVY NUCLEI ;  DINUCLEAR SYSTEM ;  MOTION ;  NECK
学科分类: Physics
通讯作者: Wen, K (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China.
部门归属: [Wen, Kai; Sakata, Fumihiko; Zhou, Shan-Gui] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, Peoples R China; [Sakata, Fumihiko] Ibaraki Univ, Grad Sch Sci & Technol, Inst Appl Beam Sci, Mito, Ibaraki 3108512, Japan; [Li, Zhu-Xia; Wu, Xi-Zhen; Zhang, Ying-Xun] China Inst Atom Energy, Beijing 102413, Peoples R China; [Zhou, Shan-Gui] Ctr Theoret Nucl Phys, Natl Lab Heavy Ion Accelerator, Lanzhou 730000, Peoples R China
英文摘要: Macroscopic parameters as well as precise information on the random force characterizing the Langevin-type description of the nuclear fusion process around the Coulomb barrier are extracted from the microscopic dynamics of individual nucleons by exploiting the numerical simulation of the improved quantum molecular dynamics. It turns out that the dissipation dynamics of the relative motion between two fusing nuclei is caused by a non-Gaussian distribution of the random force. We find that the friction coefficient as well as the time correlation function of the random force takes particularly large values in a region a little bit inside of the Coulomb barrier. A clear non-Markovian effect is observed in the time correlation function of the random force. It is further shown that an emergent dynamics of the fusion process can be described by the generalized Langevin equation with memory effects by appropriately incorporating the microscopic information of individual nucleons through the random force and its time correlation function.
资助者: Chinese Academy of Sciences (CAS) [2011T1J27]; MOST of China [2013CB834400]; NSF of China [11005155, 11075215, 11121403, 11120101005, 11275052, 11275248]; CAS [KJCX2-EW-N01]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000321209200004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15328
Appears in Collections:理论物理所2013年知识产出 _期刊论文

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Recommended Citation:
Wen, K,Sakata, F,Li, ZX,et al. Non-Gaussian Fluctuations and Non-Markovian Effects in the Nuclear Fusion Process: Langevin Dynamics Emerging from Quantum Molecular Dynamics Simulations[J]. PHYSICAL REVIEW LETTERS,2013,111(1):12501.
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