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Colloquium on May. 30th, 2019

An Overview on Cosmic Acceleration of the present Universe: Dark Energy & f(T) Gravity


Speaker: Yifu Cai (USTC)

Venue: Room 2317, SWIFAR Building

Time: 3:00 PM, Thursday, 30th May, 2019

Abstract:

In this talk I will briefly introduce the present understanding about the cosmic acceleration at present from the perspective of phenomenological study. I will review the latest observational status of the late-time cosmic acceleration and then depict how to do the model building of dynamical dark energy. Afterwards, I will also give an introduction to a type of torsional based modified gravity, which can also realize the cosmic acceleration at present. This so-called f(T) gravity and beyond theories can be depicted in a language of effective field theory and thus we can examine certain operators that are most connected with various cosmological observations.


Personal Information:

Dr. Yi-Fu Cai is a professor of physics & astronomy at the University of Science and Technology of China (USTC). He obtained the PhD degree at the Institute of High Energy Physics, CAS in 2010. He worked as a postdoc at Arizona State University and McGill University until 2015. Then he was selected into the Chinese National Youth Thousand Talents Program in 2015 and became a faculty at USTC. He was also awarded the National Science Fund for You Qing program in 2017. His particle cosmology group at USTC is responsible for the scientific goals of the AliCPT project associated with cosmological models. His research focuses on fundamental questions for cosmology, including the origin and destiny of the Universe, the dynamics of cosmic acceleration, the cosmological perturbation theory and the CMB theory.




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