Results 11 to 20 of about 7,599,029 (258)
The Cosmological Constant Problem [PDF]
Reviews of Modern Physics, 1989 Summary: Astronomical observations indicate that the cosmological constant is many orders of magnitude smaller than estimated in modern theories of elementary particles. After a brief review of the history of this problem, five different approaches to its solution are described.
S. Weinberg
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Reformulation of the Cosmological Constant Problem. [PDF]
Physical Review Letters, 2020 The standard formulation of the cosmological constant problem is based on one critical assumption-the spacetime is homogeneous and isotropic, which is true only on cosmological scales.
Qingdi Wang
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Bootstrapped Newtonian Cosmology and the Cosmological Constant Problem [PDF]
Symmetry, 2020 Bootstrapped Newtonian gravity was developed with the purpose of estimating the impact of quantum physics in the nonlinear regime of the gravitational interaction, akin to corpuscular models of black holes and inflation.
R. Casadio, A. Giusti
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A SOLUTION TO THE COSMOLOGICAL CONSTANT PROBLEM [PDF]
International Journal of Modern Physics D, 2005 According to general relativity, the present analysis shows on geometrical grounds that the cosmological constant problem is an artifact due to the unfounded link of this fundamental constant to vacuum energy density of quantum fluctuations.
Triay, Roland
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Problems with the Cosmological Constant Problem [PDF]
Philosophy Beyond Spacetime, 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.
A. Koberinski
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The Cosmological constant problem [PDF]
Contemporary Physics, 2004 Observational evidence seems to indicate that the expansion of the universe is currently accelerating. Such an acceleration strongly suggests that the content of the universe is dominated by a non-clustered form of matter, the so-called dark energy.
Brax, Philippe
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Everything you always wanted to know about the cosmological constant problem (but were afraid to ask) [PDF]
Comptes Rendus Physique, 2012 This article aims at discussing the cosmological constant problem at a pedagogical but fully technical level. We review how the vacuum energy can be regularized in flat and curved space–time and how it can be understood in terms of Feynman bubble ...
Jérôme Martin
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Superfluids and the cosmological constant problem [PDF]
Journal of Cosmology and Astroparticle Physics, 2018 We introduce a novel method to circumvent Weinberg's no-go theorem for self-tuning the cosmological vacuum energy: a finite-temperature superfluid can counter the effects of an arbitrarily large cosmological constant.
J. Khoury, Jeremy Sakstein, A. Solomon
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Über-gravity and the cosmological constant problem [PDF]
Physics of the Dark Universe, 2017 Recently, the idea of taking ensemble average over gravity models has been introduced. Based on this idea, we study the ensemble average over (effectively) all the gravity models (constructed from Ricci scalar) dubbing the name uber-gravity which is a ...
N. Khosravi
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Crunching away the cosmological constant problem: dynamical selection of a small Λ [PDF]
Journal of High Energy Physics, 2020 We propose a novel explanation for the smallness of the observed cosmological constant (CC). Regions of space with a large CC are short lived and are dynamically driven to crunch soon after the end of inflation.
Itay M. Bloch +3 more
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