• Corpus ID: 56252201

Lectures on the Cosmological Constant Problem

@article{Padilla2015LecturesOT,
  title={Lectures on the Cosmological Constant Problem},
  author={Antonio Padilla},
  journal={arXiv: High Energy Physics - Theory},
  year={2015}
}
  • Antonio Padilla
  • Published 18 February 2015
  • Physics
  • arXiv: High Energy Physics - Theory
These lectures on the cosmological constant problem were prepared for the X Mexican School on Gravitation and Mathematical Physics. The problem itself is explained in detail, emphasising the importance of radiative instability and the need to repeatedly fine tune as we change our effective description. Weinberg's no go theorem is worked through in detail. I review a number of proposals including Linde's universe multiplication, Coleman's wormholes, the fat graviton, and SLED, to name a few… 
View PDF on arXiv
127 Citations
Highly Influential Citations
1
Background Citations
37
Methods Citations
5
Results Citations
1

Figures from this paper

127 Citations

Citation Type

Citation Type

Problems with the Cosmological Constant Problem
The cosmological constant problem is widely viewed as an important barrier and hint to merging quantum field theory and general relativity. It is a barrier insofar as it remains unsolved, and a…
The cosmological constant problem and gravity in the infrared
In this thesis we explore low energy extensions of Einstein's theory of General Relativity (GR). Initially our motivation will be the cosmological constant problem where large radiative corrections…
A technical analog of the cosmological constant problem and a solution thereof
The near vanishing of the cosmological constant is one of the most puzzling open problems in theoretical physics. We consider a system, the so-called framid, that features a technically similar…
A minimal self tuning model to solve the cosmological constant problem
The expansion of the Universe is observed to be accelerating, with the simplest solution being a classical cosmological constant. However, this receives contributions from the quantum vacuum, which…
Cosmological tests of modified gravity.
  • K. Koyama
  • Physics
    Reports on progress in physics. Physical Society
  • 2016
TLDR
An overview of recent developments in modified gravity theories including f(R) gravity, braneworld gravity, Horndeski theory and massive/bigravity theory is given and how to test modifications of gravity on cosmological scales is discussed.
A Non-perturbative Hamiltonian Approach to the Cosmological Constant Problem
It was recently suggested that the cosmological constant problem as viewed in a non-perturbative framework is intimately connected to the choice of time and a physical Hamiltonian. We develop this…
The well-tempered cosmological constant
Self tuning is one of the few methods for dynamically cancelling a large cosmological constant and yet giving an accelerating universe. Its drawback is that it tends to screen all sources of energy…
Mathematical general relativity
  • A. Coley
  • Physics
    General Relativity and Gravitation
  • 2019
We present a number of open problems within general relativity. After a brief introduction to some technical mathematical issues and the famous singularity theorems, we discuss the cosmic censorship…
Cosmic eggs to relax the cosmological constant
In theories with extra dimensions, the cosmological hierarchy problem can be thought of as the unnaturally large radius of the observable universe in Kaluza-Klein units. We sketch a dynamical…
Semi-classical gravity in de Sitter spacetime and the cosmological constant
...
...

References

SHOWING 1-10 OF 73 REFERENCES
Cleaning up the cosmological constant
A bstractWe present a novel idea for screening the vacuum energy contribution to the overall value of the cosmological constant, thereby enabling us to choose the bare value of the vacuum curvature…
Everything you always wanted to know about the cosmological constant problem (but were afraid to ask)
Modified Gravity and Cosmology
The Cosmological Constant Problem: Why it's hard to get Dark Energy from Micro-physics
These notes present a brief introduction to `naturalness' problems in cosmology, and to the Cosmological Constant Problem in particular. The main focus is the `old' cosmological constant problem,…
Theoretical Aspects of Massive Gravity
Massive gravity has seen a resurgence of interest due to recent progress which has overcome its traditional problems, yielding an avenue for addressing important open questions such as the…
The big constant out, the small constant in
The cosmology of the Fab-Four
We have recently proposed a novel self tuning mechanism to alleviate the famous cosmological constant problem, based on the general scalar tensor theory proposed by Horndeski. The self-tuning model…
Unimodular gravity and general relativity from graviton self-interactions
It is commonly accepted that general relativity is the only solution to the consistency problem that appears when trying to build a theory of interacting gravitons (massless spin-2 particles).…
Beyond the Cosmological Standard Model
The cosmological constant
The energy density of the vacuum, Λ, is at least 60 orders of magnitude smaller than several known contributions to it. Approaches to this problem are tightly constrained by data ranging from…
...
...