NTU HIGHLIGHTS August 2014  
     
  Research Achievements  
 
 
Groundbreaking Dark Matter Research Makes Cover of International Physics Journal

An NTU research team working in collaboration with a colleague at the University of the Basque Country (UPV/EHU) recently discovered that an extremely light dark matter can potentially solve the inconsistency problems pertaining to dwarf galaxy observations encountered by traditional studies based on massive dark matter.

The study, conducted by Dr. Hsi-Yu Schive and Prof. Tzi-Hong Chiueh of the Department of Physics in collaboration with theoretical physicist Dr. Tom Broadhurst of UPV/EHU, differs from previous notions of "massive" dark matter in arguing that extremely light dark matter (dubbed ψDM), whose particle is 10-28 times lighter than the electron, makes up the majority of matter in the universe as it is incredibly dense and copious. The study also found evidence of an intriguing connection between cosmic dark matter and the supermassive black holes (SMBH) found at the nucleus of every galaxy. This, according to the researchers, presents a potential path to solving previously unanswered questions pertaining to the relation and influences between solitons and the SMBH.

To further analyze its findings, the team built a 64-graphic card cluster computational instrument specifically for the project. The graphic-card cluster was donated to the team by Chip-Bond Technology Inc. in 2013.

The research team is the first in the world to conduct such ψDM simulations for the local universe. As a result, its breakthrough was published in and made the cover of the esteemed physics journal Nature Physics on July 1 under the title "Cosmic Structure as the Quantum Interference of a Coherent Dark Wave."

Dr. Hsi-Yu Schive is a world-leading expert in graphic-card accelerated computation. Prof. Tzi-Hong Chiueh is an NTU alumnus and expert in astrophysics and the dynamics of evolution. Prof. Chiueh is currently a distinguished professor of the Department of Physics.