Non-Gaussian Fluctuations and Non-Markovian Effects in the Nuclear Fusion Process: Langevin Dynamics Emerging from Quantum Molecular Dynamics Simulations

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	Non-Gaussian Fluctuations and Non-Markovian Effects in the Nuclear Fusion Process: Langevin Dynamics Emerging from Quantum Molecular Dynamics Simulations
	Zhou, SG
刊名	PHYSICAL REVIEW LETTERS
	2013
卷号	111 期号:1 页码:12501
关键词	HEAVY-ION COLLISIONS SUPERHEAVY NUCLEI DINUCLEAR SYSTEM MOTION NECK
ISSN号	0031-9007
通讯作者	Wen, K (reprint author), Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, 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.
学科主题	Physics
收录类别	SCI
资助信息	Chinese Academy of Sciences (CAS) [2011T1J27]; MOST of China [2013CB834400]; NSF of China [11005155, 11075215, 11121403, 11120101005, 11275052, 11275248]; CAS [KJCX2-EW-N01]
原文出处	http://dx.doi.org/10.1103/PhysRevLett.111.012501
语种	英语
WOS记录号	WOS:000321209200004
公开日期	2014-04-25
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/15328]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Zhou, SG. 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.
APA	Zhou, SG.(2013).Non-Gaussian Fluctuations and Non-Markovian Effects in the Nuclear Fusion Process: Langevin Dynamics Emerging from Quantum Molecular Dynamics Simulations.PHYSICAL REVIEW LETTERS,111(1),12501.
MLA	Zhou, SG."Non-Gaussian Fluctuations and Non-Markovian Effects in the Nuclear Fusion Process: Langevin Dynamics Emerging from Quantum Molecular Dynamics Simulations".PHYSICAL REVIEW LETTERS 111.1(2013):12501.