Results 281 to 290 of about 16,133 (302)

THE COSMOLOGICAL CONSTANT PROBLEM

International Journal of Modern Physics D, 1992
The cosmological constant is a macroscopic parameter which controls the large-scale structure of the Universe. All observations to date have shown that it is very small. However, our modern microscopic theory of particle physics and gravity suggests that the cosmological constant should be very large.
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The Cosmological Constant in Quantum Cosmology

AIP Conference Proceedings, 2008
Hawking proposed that the cosmological constant is probably zero in quantum cosmology in 1984. By using the right configuration for the wave function of the universe, a complete proof is found very recently.
Zhong Chao Wu, Da-Shin Lee, Wolung Lee, She-Sheng Xue   +3 more
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Inhomogeneous cosmologies with cosmological constant

Physics Letters A, 1984
Abstract We give a new class of exact inhomogeneous solutions to Einstein's equations with non-zero cosmological constant and zero pressure. They generalize the de Sitter space-time and evolve towards a state that is stationary inside the event horizon of any future inextendible time-like curve and confirm the cosmic “no hair” conjecture.
John D. Barrow, J. Stein-Schabes
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Conformal cosmology with no cosmological constant

General Relativity and Gravitation, 1990
We present a locally conformal invariant cosmology based on the Weyl tensor rather than the Einstein one. The cosmology admits of a de Sitter solution with no cosmological constant.
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Exponentially Small Cosmological Constant in String Theory

Physical Review Letters, 2022
Liam Mcallister, Jakob Moritz, Mehmet Demirtas   +2 more
exaly  

Revisiting a Negative Cosmological Constant from Low-Redshift Data

Symmetry, 2019
Luca Visinelli, Sunny Vagnozzi, Vagnozzi Sunny   +2 more
exaly  

Gravitational Waves from Isolated Systems: Surprising Consequences of a Positive Cosmological Constant

Physical Review Letters, 2016
Beatrice Bonga, Abhay Ashtekar
exaly  

Screening of cosmological constant in non-local gravity

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 2011
Misao Sasaki, Shin'Ichi Nojiri, S D Odintsov   +2 more
exaly  

On Exclusion of Positive Cosmological Constant

Fortschritte Der Physik, 2019
Gia Dvali
exaly  

Cosmological Constant and Fundamental Length

American Journal of Physics, 1971
Finkelstein David, Anderson James L
exaly