Speaker
Dr
Miguel ZUMALACARREGUI
(ITP Heidelberg)
Description
Horndeski's theory of gravity (the most general
scalar-tensor theory with second-order equations of motion)
has recently attracted considerable attention as a framework
to study gravitation and cosmology. I will challenge the
generality of Horndeski's theory as the most general,
physically reasonable scalar-tensor theory by analyzing the
simplest theory beyond Horndeski and its equations of
motion. Theories beyond Horndeski have unique characeristics
and represent a new class of scalar-tensor theories of
gravity. If time permits, I will present new results on
bigravity, regarding the implications of growing modes in
the tensor sector for CMB observations
