Conveners
Modified gravity theories
- Emmanuel Saridakis (National Technical University of Athens & National Observatory of Athens)
Modified gravity theories
- Emmanuel Saridakis (National Technical University of Athens & National Observatory of Athens)
Modified gravity theories
- Emmanuel Saridakis (National Technical University of Athens & National Observatory of Athens)
Modified gravity theories
- Emmanuel Saridakis (National Technical University of Athens & National Observatory of Athens)
Description
Newtonian gravity was a very successful gravitational theory in agreement with all observations and experiments up to late 19th century, where the enhancement of observational/experimental precision, as well as the improvement of theoretical calculations, led to tensions, which in turn led to general relativity. General relativity is a very successful gravitational theory in agreement with all observations and experiments, however we may have entered the era where the enhancement of observational/experimental precision, as well as the improvement of theoretical calculations, leads to tensions, whose solution may require to construct a modified theory of gravity. Modified gravity must have general relativity as a particular limit, in the same way that general relativity has Newtonian gravity as a particular limit.
We briefly review general relativity, mentioning its (arbitrary or guided by experiments and observations) assumptions and considerations. Then we abandon them, resulting to various modified theories of gravity, including f(R) and f(G) gravity, scalar-tensor and Horndeski theories, massive gravity, torsional theories, f(T) and teleparallel Horndeski gravity, etc, mentioning their possible smoking guns in cosmological, black-hole, as well as gravitational-wave observations.
