Quantum cosmology from the de Broglie–Bohm perspective
TLDR
In this article, the main results that have been obtained in quantum cosmology from the perspective of the de Broglie?Bohm quantum theory are reviewed and compared with other approaches, and the physical reasons for some discrepancies that occur.Abstract:
We review the main results that have been obtained in quantum cosmology from the perspective of the de Broglie?Bohm quantum theory. As it is a dynamical theory of assumed objectively real trajectories in the configuration space of the physical system under investigation, this quantum theory is not essentially probabilistic and dispenses the collapse postulate, turning it suitable to be applied to cosmology. In the framework of minisuperspace models, we show how quantum cosmological effects in the de?Broglie-Bohm approach can avoid the initial singularity, and isotropize the Universe. We then extend minisuperspace in order to include linear cosmological perturbations. We present the main equations which govern the dynamics of quantum cosmological perturbations evolving in non-singular quantum cosmological backgrounds, and calculate some of their observational consequences. These results are not known how to be obtained in other approaches to quantum theory. In the general case of full superspace, we enumerate the possible structures of quantum space and time that emerge from the de Broglie?Bohm picture. Finally, we compare some of the results coming from the de Broglie?Bohm theory with other approaches, and discuss the physical reasons for some discrepancies that occur.read more
Citations
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References
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Measurements of Omega and Lambda from 42 High-Redshift Supernovae
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TL;DR: In this paper, the mass density, Omega_M, and cosmological-constant energy density of the universe were measured by the analysis of 42 Type Ia supernovae discovered by the Supernova Cosmology Project.
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Quantum Fields in Curved Space
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