Results 181 to 190 of about 116,432 (201)

Quantum Cosmology. I

Physical Review, 1969
Summary: The Hamiltonian methods of Arnowitt, Deser, and Misner can be applied to homogeneous cosmological models, and prove to be an efficient way both of constructing the Einstein equations and of studying their solutions. By using an appropriate form for the metric, one finds that the constraint equations for these models can be solved explicitly ...
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Inflation and quantum cosmology

Physica Scripta, 1990
Contents: 1. Introduction; 2. Chaotic inflation; 3. Self-reproducing inflationary universe; 4. Adjusting to the new paradigm: absence of cosmological constraints on the axion mass in the inflationary cosmology; 5. Inflation and the wave function of the universe; 6. Chaotic inflation versus extended inflation; 7. Stochastic approach to the baby universe
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Superstrings in quantum cosmology

Physical Review D, 1992
We consider the dynamics of a four-dimensional universe using the pointlike field-theory effective action of superstrings. We use the boundary conditions of Hartle and Hawking and Vilenkin to solve the Wheeler-DeWitt equation. We find that under certain conditions the Universe will tunnel from a Euclidean regime to a Lorentzian regime.
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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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Quantum cosmology

Zeitschrift Fur Naturforschung - Section A Journal of Physical Sciences, 2022
Claus Kiefer
exaly  

Quantum Cosmology and the Cosmological Constant

1991
The origin of our universe and the small scale structure of spacetime lie deep in the realm of quantum theory, yet they seem to relate to the large scale features of the universe. The value of the cosmological constant is probably zero, but a small value related to a light particle mass is possible.
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From Quantum Cosmology to Quantum Gravity

1983
The remarkable success of general relativity is marred by two fundamental difficulties at two apparently different scales. First the acausal character of the hot big bang cosmology is unacceptable because it leads to dynamical instabilities when extrapolated back to the Planck temperature.
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A quantum cosmology approach to cosmic coincidence and inflation

Physics of the Dark Universe, 2023
Abolhassan Mohammadi, Durmus Demir, S Jalalzadeh   +2 more
exaly  

Emergent de Sitter Epoch of the Quantum Cosmos from Loop Quantum Cosmology

Physical Review Letters, 2018
Mehdi Assanioussi, Andrea Dapor, Klaus Liegener   +2 more
exaly  

Noncommutative quantum cosmology

General Relativity and Gravitation, 2005
Luis O Pimentel
exaly