Results 31 to 40 of about 131,283 (219)
New Solution of the Cosmological Constant Problems [PDF]
Physical Review Letters, 2011 5 pages; v3: version accepted by Phys.
Barrow, John D., Shaw, Douglas J.
openaire +3 more sources
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
doaj +1 more source
A natural cosmological constant from chameleons
Physics Letters B, 2015 We present a simple model where the effective cosmological constant appears from chameleon scalar fields. For a Kachru–Kallosh–Linde–Trivedi (KKLT)-inspired form of the potential and a particular chameleon coupling to the local density, patches of ...
Horatiu Nastase, Amanda Weltman
doaj +1 more source
Information Dark Energy Can Resolve the Hubble Tension and Is Falsifiable by Experiment
Entropy, 2022 We consider the role information energy can play as a source of dark energy. Firstly, we note that if stars and structure had not formed in the universe, elemental bits of information describing the attributes of particles would have exhibited properties
Michael Paul Gough
doaj +1 more source
A Brane World Perspective on the Cosmological Constant and the Hierarchy Problems [PDF]
, 2001 We elaborate on the recently proposed static brane world scenario, where the effective 4-D cosmological constant is exponentially small when parallel 3-branes are far apart.
A. Aurilia +83 more
core +1 more source
The cosmological constant problem and quintessence [PDF]
Classical and Quantum Gravity, 2002 I briefly review the cosmological constant problem and the issue of dark energy (or quintessence). Within the framework of quantum field theory, the vacuum expectation value of the energy momentum tensor formally diverges as $k^4$. A cutoff at the Planck or electroweak scale leads to a cosmological constant which is, respectively, $10^{123}$ or $10^{55}
openaire +3 more sources
Problems with the Cosmological Constant Problem [PDF]
, 2021 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 solution may hint at a fuller theory of quantum gravity. I critically examine the arguments used to pose the cosmological constant problem, and find many of the
openaire +1 more source
Quantum vacuum energy in general relativity
European Physical Journal C: Particles and Fields, 2018 The paper deals with the scale discrepancy between the observed vacuum energy in cosmology and the theoretical quantum vacuum energy (cosmological constant problem).
Christian Henke
doaj +1 more source
Can the quantum vacuum fluctuations really solve the cosmological constant problem?
European Physical Journal C: Particles and Fields, 2020 Recently it has been argued that a correct reading of the quantum fluctuations of the vacuum could lead to a solution to the cosmological constant problem.
Gabriel R. Bengochea +3 more
doaj +1 more source
Codimension Two Compactifications and the Cosmological Constant Problem [PDF]
, 2003 We consider solutions of six dimensional Einstein equations with two compact dimensions. It is shown that one can introduce 3-branes in this background in such a way that the effective four dimensional cosmological constant is completely independent of ...
Antoniadis I +14 more
core +2 more sources