Results 11 to 20 of about 6,202 (230)
Quantum String Cosmology [PDF]
Universe, 2021 We present a short review of possible applications of the Wheeler-De Witt equation to cosmological models based on the low-energy string effective action, and characterised by an initial regime of asymptotically flat, low energy, weak coupling evolution.
Maurizio Gasperini
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Time in Quantum Cosmology [PDF]
Universe, 2022 Time in quantum gravity is not a well-defined notion despite its central role in the very definition of dynamics. Using the formalism of quantum geometrodynamics, we briefly review the problem and illustrate it with two proposed solutions.
Claus Kiefer, Patrick Peter
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Zeitschrift für Naturforschung A, 2022 AbstractWe give an introduction into quantum cosmology with emphasis on its conceptual parts. After a general motivation, we review the formalism of canonical quantum gravity on which discussions of quantum cosmology are usually based. We then present the minisuperspace Wheeler–DeWitt equation and elaborate on the problem of time, the imposition of ...
Kiefer, Claus, Sandhoefer, Barbara
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QUANTUM COSMOLOGIES AND THE “BEGINNING”
Zygon: Journal of Religion and Science, 1991 Abstract. The cosmology proposed by Stephen Hawking has been understood as support for an atheistic stance, due mainly to its view of the nature of time in combination with the absence of explicit boundary conditions. Against such a view, this article argues that one might develop a theistic understanding of the Universe in the context of Hawking's ...
Willem B. Drees
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Lorentzian quantum cosmology [PDF]
Physical Review D, 2017 We argue that the Lorentzian path integral is a better starting point for quantum cosmology than the Euclidean version. In particular, we revisit the mini-superspace calculation of the Feynman path integral for quantum gravity with a positive cosmological constant. Instead of rotating to Euclidean time, we deform the contour of integration over metrics
Feldbrugge, Job +2 more
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Supersymmetry and quantum cosmology [PDF]
Physics Letters B, 2001 19 ...
F. Assaoui, T. Lhallabi
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Modular quantum cosmology [PDF]
Classical and Quantum Gravity, 1999 Latex, 23 pages, 1 figure.
Ricardo Schiappa, Orfeu Bertolami
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Noncommutative quantum cosmology [PDF]
General Relativity and Gravitation, 2005 Revtex4, 3 pages, 2 figures, to appear in Gen.Rel ...
César Mora +2 more
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Universe, 2021 The goal of this contribution is to present the properties of a class of quantum bouncing models in which the quantum bounce originates from the Dirac canonical quantization of a midi-superspace model composed of a homogeneous and isotropic background ...
Nelson Pinto-Neto
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