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Cosmic clues: DESI, dark energy, and the cosmological constant problem [PDF]
Journal of High Energy PhysicsSeveral attempts to solve the cosmological constant problem, which concerns the value of the cosmological constant being extremely smaller than the Standard Model mass scales, have introduced a scalar field with a very flat potential that can be ...
Wen Yin
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Cosmological constant—the weight of the vacuum [PDF]
, 2002 Recent cosmological observations suggest the existence ofa positive cosmological constantwith the magnitude (G˝=c 3 ) ≈ 10 −123 . This review discusses several aspects ofthe cosmological constant both f rom the cosmological (Sections 1- 6) and .eld ...
T. Padmanabhan
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Cosmological bounce and the cosmological constant problem
SSRN Electronic Journal, 2022 We discuss how the modifications of the standard Einstein\u27s equations needed to support the cosmological bounce can at the same time lead to vanishing of the well known cosmological constant problem, while also studying the effects of spacetime ...
Sossich, Marko +3 more
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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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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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Cosmological constant, fine structure constant and beyond [PDF]
, 2016 In the present work, we consider the cosmological constant model $$\Lambda \propto \alpha ^{-6}$$Λ∝α-6, which is well motivated from three independent approaches.
Hao Wei, Xiao-Bo Zou, Hong-Yu Li, D. Xue
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Cosmological constant from a deformation of the Wheeler–DeWitt equation [PDF]
Nuclear Physics B, 2016 In this paper, we consider the Wheeler–DeWitt equation modified by a deformation of the second quantized canonical commutation relations. Such modified commutation relations are induced by a Generalized Uncertainty Principle.
Remo Garattini, Mir Faizal
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Dark energy in light of the early JWST observations: case for a negative cosmological constant? [PDF]
Journal of Cosmology and Astroparticle Physics, 2023 Early data from the James Webb Space Telescope (JWST) has uncovered the existence of a surprisingly abundant population of very massive galaxies at extremely high redshift, which are hard to accommodate within the standard ΛCDM cosmology.
Shahnawaz A. Adil +3 more
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The cosmological constant problem and running vacuum in the expanding universe [PDF]
Philosophical Transactions of the Royal Society A, 2022 It is well known that quantum field theory (QFT) induces a huge value of the cosmological constant (CC), Λ, which is outrageously inconsistent with cosmological observations.
Joan Solà Peracaula
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Relaxing cosmological tensions with a sign switching cosmological constant [PDF]
Physical Review D, 2021 Inspired by the recent conjecture originated from graduated dark energy that the Universe has recently transitioned from anti-de Sitter vacua to de Sitter vacua, we extend the $\Lambda$CDM model by a cosmological constant ($\Lambda_{\rm s}$) that ...
Ö. Akarsu +3 more
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