[NTU-NCTS String Seminar] Dilatoninc Einstein Gauss-Bonnet Gravity-Black Holes and Cosmology

  • Event Date: 2024-06-28
  • High energy theory
  • Speaker: Bum-Hoon Lee (Sogang University)  /  Host: Prof. Yu-tin Huang
    Place: Rm. 815, Dept. of Physics, NTU

Title：[NTU-NCTS String Seminar] Dilatoninc Einstein Gauss-Bonnet Gravity-Black Holes and Cosmology
Speaker：Bum-Hoon Lee (Sogang University)
Date：2024/06/28 (Wed.)
Time：14:30
 
Abstract：
We begin with the motivation for the Gravity models beyond Einstein's Gravity. We then describe the Gravity model with the Gauss-Bonnet curvature term and the cosmological constant added as one of the simplest extensions of Einstein's gravity with the higher curvature term. The physical properties of these models will be studied through the black holes., which show the properties of having the hair and also minimum mass below which no black hole is formed. Nonperturbative stability and the thermodynamic properties of the black hole system will be briefly mentioned.  We then move on to the implication to the cosmological evolution in these models. By combining with the WIMP dark matter and GW, we investigate the constraints on the theory.  Finally, it will be shown that new possible phases: “Slow-roll”, “fast-roll”, and “kination” at higher temperatures are possible, in addition to the well-accepted radiation dominant, matter dominant, and cosmological constant dominant phases of the standard cosmological model. We explain the impact to the Stochastic Gravitational Background due to the Standard Model particles.

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