Results 31 to 40 of about 7,599,029 (258)
Hidden variables of gravity and geometry and the cosmological constant problem [PDF]
Physical Review D, 2022 We extend General Relativity by promoting Planck scale and the cosmological constant into integration constants, interpreted as fluxes of $4$-forms hiding in the theory.
N. Kaloper
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Cosmological constant problem on the horizon [PDF]
Physical Review D, 2022 We revisit the quantum cosmological constant problem and highlight the important roles played by the dS horizon of zero point energy. We argue that fields which are light enough to have dS horizon of zero point energy comparable to the FLRW Hubble radius ...
H. Firouzjahi
semanticscholar +1 more source
Well-tempered teleparallel Horndeski cosmology: a teleparallel variation to the cosmological constant problem [PDF]
Journal of Cosmology and Astroparticle Physics, 2021 Well-tempering is a promising classical method of dynamically screening an arbitrarily large vacuum energy and generating a late-time, low energy de Sitter vacuum state.
R. C. Bernardo +3 more
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Cosmological Bounce and the Cosmological Constant Problem
SSRN Electronic Journal, 2022 32 pages, 9 ...
Pavlović, Petar, Sossich, Marko
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The Cosmological Constant Problem in Brane-world Cosmology
EAS Publications Series, 2008 It is shown that the cosmological constant problem in brane-world is different from the same problem in general relativity, essentially because the gauge fields fields contributing to the vacuum energy are confined to the brane-world, but the cosmological term propagates in the bulk.
M.D. Maia
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THE NATURE OF THE COSMOLOGICAL CONSTANT PROBLEM [PDF]
International Journal of Modern Physics A, 2009 General relativity postulates the Minkowski space-time as the standard (flat) geometry against which we compare all curved space-times and also as the gravitational ground state where particles, quantum fields and their vacua are defined. On the other hand, experimental evidences tell that there exists a non-zero cosmological constant, which implies ...
Maia, M. D. +2 more
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Comments on the cosmological constant in generalized uncertainty models
Frontiers in Astronomy and Space Sciences, 2022 The existence of a small, non-zero cosmological constant is one of the major puzzles in fundamental physics. Naively, quantum field theory arguments would imply a cosmological constant which is up to 10,120 times larger than the observed one.
Michael Bishop +3 more
doaj +1 more source
A NOVEL APPROACH TO THE COSMOLOGICAL CONSTANT PROBLEM [PDF]
International Journal of Modern Physics A, 2004 We propose a novel infinite-volume brane world scenario where we live on a noninflating spherical 3-brane, whose radius is somewhat larger than the present Hubble size, embedded in higher dimensional bulk. Once we include higher curvature terms in the bulk, we find completely smooth solutions with the property that the 3-brane world-volume is ...
Iglesias, Alberto, Kakushadze, Zurab
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cosmological constant problem and Hubble constantU
, 2023 cosmological constant problem and Hubble ...
Alberto Miró (9003836)
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New Solution of the Cosmological Constant Problems [PDF]
Physical Review Letters, 2011 We extend the usual gravitational action principle by promoting the bare cosmological constant (CC) from a parameter to a field which can take many possible values. Variation leads to a new integral constraint equation which determines the classical value of the effective CC that dominates the wave function of the universe.
Barrow, John D., Shaw, Douglas J.
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