Results 151 to 160 of about 1,973 (175)
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SUPERSYMMETRIC QUANTUM COSMOLOGY
International Journal of Modern Physics A, 1993Supersymmetric minisuperspace quantization is studied for cosmological models without interaction (Bianchi type I) and for models with interaction like Bianchi type IX, the Taub and the FRW (k=+1) model. In particular for the last two cases the profound differences with standard quantum cosmology are emphasized.
Macías, A., Obregón, O., Socorro, J.
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Physical Review D, 1987
This paper considers the extension of the ideas of quantum cosmology and, in particular, the proposal of Hartle and Hawking for the boundary conditions of the Universe, to models which incorporate fermions in a realistic manner. We consider inhomogeneous fermionic perturbations about a homogeneous, isotropic minisuperspace background model, by ...
, D'Eath, , Halliwell
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This paper considers the extension of the ideas of quantum cosmology and, in particular, the proposal of Hartle and Hawking for the boundary conditions of the Universe, to models which incorporate fermions in a realistic manner. We consider inhomogeneous fermionic perturbations about a homogeneous, isotropic minisuperspace background model, by ...
, D'Eath, , Halliwell
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2007
Abstract This chapter presents the application of quantum gravity to the Universe as a whole. The concept of minisuperspace is introduced and discussed. Various solutions of the Wheeler-DeWitt equation are found and discussed. Structure formation is discussed as well as boundary conditions and singularity avoidance.
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Abstract This chapter presents the application of quantum gravity to the Universe as a whole. The concept of minisuperspace is introduced and discussed. Various solutions of the Wheeler-DeWitt equation are found and discussed. Structure formation is discussed as well as boundary conditions and singularity avoidance.
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Quantum cosmology and recollapse
Physical Review D, 1987The wave function of the Universe defined by the Hartle-Hawking proposal is studied for two minisuperspace models, the Friedmann-Robertson-Walker universe with a massive scalar field and the anisotropic Kantowski-Sachs cosmology. Solutions of the Wheeler-DeWitt equation are evaluated numerically.
, Laflamme, , Shellard
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Decoherence in quantum cosmology
Physical Review D, 1989We discuss the manner in which the gravitational field becomes classical in quantum cosmology. This involves two steps. First, one must show that the quantum state of the gravitational field becomes strongly peaked about a set of classical configurations.
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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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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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Quantum cosmology with electromagnetism
Physical Review D, 1988We investigate the semiclassical quantum cosmology of the spatially homogeneous k = +1 Friedmann-Robertson-Walker minisuperspace model with the electromagnetic field included as a small perturbation on the gravitational background. The wave function is chosen adopting the Hartle-Hawking proposal. Owing to conformal invariance, the electromagnetic field
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The Cosmological Constant in Quantum Cosmology
AIP Conference Proceedings, 2008Hawking 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 +3 more
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Inflation and quantum cosmology
Physica Scripta, 1990Contents: 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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'Quantum Cosmology' offers a guided introduction to the quantum aspects of the cosmos. Starting with an overview of early universe cosmology, the book builds up to advanced topics such as the Wheeler–DeWitt equation, gravitational path integrals, and the no-boundary proposal for the wave function of the universe.
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