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【7.14】科技创新论坛(272)天河2号计算机宇宙中微子数值模拟
2017-07-10|文章来源: |浏览次数: |【
 

科技创新论坛(273)
报告题目:天河2号计算机宇宙中微子数值模拟
报告人:张同杰 教授(北京师范大学)
主持人:曹俊 研究员
时间:7月14日上午10点
地点:化学楼C305

报告简介:
Constraining neutrino mass remains an elusive challenge in current physics and astronomy. Precision measurements are expected from several upcoming cosmological probes of large-scale structure. Achieving this goal relies on an equal level of precision from theoretical predictions of neutrino clustering. Numerical simulations of the non-linear evolution of cold dark matter and neutrinos play a pivotal role in this process. We run the world’s largest cosmological N-body simulation, named TianNu, which coevolved just under 3 trillion CDM and neutrino particles on Tianhe-2(Galaxy-2) supercomputer. Based on TianNu data, we discover the differential neutrino condensation effect and the dipole in real space using the simulation density and velocity fields. In addition, we also provide details of our production run, which uses 86% of the machine (13,824 compute nodes), and a discussion of the unanticipated computational challenges that were encountered during the TianNu runtime.

报告人简介:
张同杰,北京师范大学天文系教授。
中科院上海天文台获天体物理学博士学位;美国亚利桑那大学物理系和天文系(UofA) 访问合作与博士后研究;加拿大理论天体物理所(CITA)(多伦多大学)访问学者;美国加州大学伯克利分校(U.C.Berkeley)天文系和劳伦兹国家实验室(LBNL)高级访问学者。
主要研究领域:宇宙学与相对论天体物理;宇宙加速膨胀与暗能量;宇宙学高分辨率计算机数值模拟;搜寻地外文明与系外行星研究。

 

高能所科研计划处、党政联合办、教育处

2017年7月7日


 
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