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The Cosmological Constant [PDF]
Living Reviews in Relativity, 2001 This is a review of the physics and cosmology of the cosmological constant. Focusing on recent developments, I present a pedagogical overview of cosmology in the presence of a cosmological constant, observational constraints on its magnitude, and the ...
Carroll Sean M.
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The cosmological constant in supergravity [PDF]
European Physical Journal C: Particles and Fields, 2018 We propose a supersymmetrisation of the cosmological constant in ordinary $$N=1$$ N=1 supergravity that breaks supersymmetry spontaneously by a constant Fayet-Iliopoulos (FI) term associated to a U(1) symmetry.
I. Antoniadis +3 more
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Scholarpedia, 2010 In the context of cosmology the cosmological constant is a homogeneous energy density that causes the expansion of the universe to accelerate. Originally proposed early in the development of general relativity in order to allow a static universe solution
Brendan Griffen +3 more
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Mirror QCD and Cosmological Constant
Universe, 2017 An analog of Quantum Chromo Dynamics (QCD) sector known as mirror QCD (mQCD) can affect the cosmological evolution due to a non-trivial contribution to the Cosmological Constant analogous to that induced by the ground state in non-perturbative QCD.
Roman Pasechnik +2 more
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Deconstructing the Cosmological Constant
, 2003 Deconstruction provides a novel way of dealing with the notoriously difficult ultraviolet problems of four-dimensional gravity. This approach also naturally leads to a new perspective on the holographic principle, tying it to the fundamental requirements
Djordje Minic +5 more
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Kac-Moody algebras and the cosmological constant
Physics Letters B, 2020 We show that the theory of gravity constructed from the non-linear realisation of the semi-direct product of the Kac-Moody algebra A1+++ with its vector representation does not allow a cosmological constant.
Peter West
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Fixing cosmological constant on the event horizon
European Physical Journal C: Particles and Fields, 2022 Standard cosmological equations are written for the Hubble volume, while the real boundary of space-time is the event horizon. Within the unimodular and thermodynamic approaches to gravity, the dark energy term in cosmological equations appears as an ...
Merab Gogberashvili
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Graviton fluctuations erase the cosmological constant
Physics Letters B, 2017 Graviton fluctuations induce strong non-perturbative infrared renormalization effects for the cosmological constant. The functional renormalization flow drives a positive cosmological constant towards zero, solving the cosmological constant problem ...
C. Wetterich
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Unimodular Approaches to the Cosmological Constant Problem
Universe, 2023 We review selected aspects of unimodular gravity and we discuss its viability as a solution of the old cosmological constant problem. In unimodular gravity, the cosmological constant is promoted to a global degree of freedom.
Pavel Jiroušek
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MeV Dark Energy Emission from a De Sitter Universe
Universe, 2023 The evolution of a de Sitter Universe is the basis for both the accelerated Universe and the late-stationary Universe. So, how do we differentiate between both universes?
Yasmín B. Alcántara-Pérez +3 more
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