Results 1 to 10 of about 1,306 (159)
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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Modified Gravity Approaches to the Cosmological Constant Problem
Universe, 2023 The cosmological constant and its phenomenology remain among the greatest puzzles in theoretical physics. We review how modifications of Einstein’s general relativity could alleviate the different problems associated with it that result from the ...
Foundational Aspects of Dark Energy (FADE) Collaboration +7 more
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Reformulation of the Cosmological Constant Problem [PDF]
Physical Review Letters, 2020 5 pages, 1 ...
Qingdi Wang
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On the cosmological constant problem
Physics Letters B, 2019 An additional variation of the Einstein-Hilbert action with respect to the Planck mass provides a constraint on the average Ricci scalar that prevents vacuum energy from gravitating. Consideration of the evolution of the inhomogeneous matter distribution
Lucas Lombriser
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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.
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Universe, 2020 The stage of a super-early (primordial) scale-invariant Universe is considered on the basis of the Poincaré–Weyl gauge theory of gravity in a Cartan–Weyl space-time. An approximate solution has been found that demonstrates an inflationary behavior of the
Ol’ga Babourova, Boris Frolov
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Revisiting the Cosmological Constant Problem within Quantum Cosmology
Universe, 2020 A new perspective on the Cosmological Constant Problem (CCP) is proposed and discussed within the multiverse approach of Quantum Cosmology. It is assumed that each member of the ensemble of universes has a characteristic scale a that can be used as ...
Vesselin G. Gueorguiev, Andre Maeder
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Diluting Solutions of the Cosmological Constant Problem [PDF]
Modern Physics Letters A, 2003 We discuss the cosmological constant problem in the context of higher codimension brane world scenarios with infinite-volume extra dimensions.
Olindo Corradini, Zurab Kakushadze
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Bootstrapped Newtonian Cosmology and the Cosmological Constant Problem [PDF]
Symmetry, 2021 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. In this work, we set the ground for extending the bootstrapped Newtonian picture to cosmological spaces.
Casadio, Roberto, Giusti, Andrea
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On the cosmological constant problem and brane-world geometry
Open Physics, 2011 Capistrano Abraão, Odon Pedro
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