Explore the fascinating realm of dark energy and modified gravity in this comprehensive lecture by Alessandra Silvestri from the International Centre for Theoretical Sciences. Delve into the complexities of our universe, starting with an overview of the ΛCDM model and the uniqueness of General Relativity. Examine various theoretical frameworks, including scalar-tensor theories, f(R) gravity, Galileons, and Horndeski theory. Learn about the impact of gravitational wave observations, particularly GW170817, on modified gravity theories. Investigate screening mechanisms and their types, with a focus on the Chameleon Mechanism. Gain insights into local gravity tests, theory stability, and observable effects of modified gravity. Conclude with a Q&A session for deeper understanding of these cutting-edge concepts in cosmology and gravitational physics.
Dark Energy and Modified Gravity - Lecture 1
International Centre for Theoretical Sciences via YouTube
Overview
Syllabus
Start
Dark Energy and Modified Gravity Lecture - 1
Plan for the lectures
A success story
Our Universe
LCDM
How special is GR ?
Generalized Kronecker delta
Lovelock scalars
Scalar-tensor theories
Theoretical Landscape
fR gravity
Generalized Brans-Dicke
Galileons
Horndeski
Beyond Horndeski
DHOST
Massive Gravity
‘When modifying gravity, be aware of ...
Local tests of gravity
Stability of your theory
Gravitational Waves
GW170817
The aftermath of GW 170817
Screening Mechanisms
Screening Mechanisms: types
Chameleon Mechanism
Around spherically symmetric static source
Around ‘spherically symmetric cow’
Thin-shell configuration
Something observable?
Q&A/ more in depth
Taught by
International Centre for Theoretical Sciences
