銀河尺度內量子效應


物理系學生會議:銀河尺度內量子效應 - 模糊暗物質宇宙模擬及大尺度結構

Talk:- Quantum Effect in Galactic Scale: Fuzzy Dark Matter Cosmological Simulation and Large Scale Structure

The Ultra-Light Axion (ULA) is a dark matter candidate with mass o(10^-22) eV and de Broglie wavelength of order kpc. Such an axion, also called the Fuzzy Dark Matter (FDM), thermalizes via the gravitational force and forms a Bose-Einstein condensate. Recent studies suggested that the quantum pressure from the FDM can significantly affect the structure formation in small scales, thus alleviating the so-called “small-scale crisis”. We develop a new technique to discretize the quantum pressure and illustrate the interactions among FDM particles in the N-body simulation. With our highly efficient algorithm, the largest scale cosmological simulation of FDM model has been performed. The non-trivial effect of quantum pressure on Large Scale Structure (LSS) has been revealed. The constraints from recent Lyman-alpha Forest observations are discussed. 
 
時間:2017.05.20(六) 13:30 ~ 13:45
地點:香港中文大學 科學館LT4
講者:Jiajun Zhang
語言:英語

#131

此活動由香港中文大學物理系主辦。

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