Seminar
Extension of Scalar-tensor Theories and Spatially Covariant Gravity
Prof.
GAO Xian
Sun Yat-sen University
30 May 2019 (Thursday)
10:00 am
IAS4042, 4/F, Lo Ka Chung Building, Lee Shau Kee Campus, HKUST
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.
The seminar is free and open to the public. No registration is required. Seating is on a first come, first served basis.
HKUST Jockey Club Institute for Advanced Study
URL:
http://ias.ust.hk
Enquiries: ias@ust.hk / 2358 5912
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