Seminar:- Extension of Scalar-tensor Theories and Spatially Covariant Gravity
In order to explain the accelerated expansion of our universe in its early stage and today, the most popular approach is to introduce a scalar field to drive the inflation or to act as dark energy. This is the so-called scalar-tensor theory of gravity. In this talk, the speaker will first review the development of the scalar-tensor theories with higher derivatives in recent years. Then he will introduce the idea of constructing gravity theories respecting only the spatial symmetry, which propagate a single scalar degree of freedom and thus correspond to even a larger class of healthy scalar-tensor theories with higher derivatives. Finally, he will also discuss the propagation of gravitational waves in the framework.
地點：香港科技大學 李兆基校園 盧家驄薈萃樓 高研院4042室
講者：高顯 教授 Prof. GAO Xian(中山大學)