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Noncommutative Quantum Cosmology [PDF]

Physical Review Letters, 2002
We propose a model for noncommutative quantum cosmology by means of a deformation of minisuperspace. For the Kantowski-Sachs metric we are able to find the exact wave function.
A. Connes, A. Connes, A. Connes, A. H. Chamseddine, A. Macías, A. Mazumdar, B. L. Hu, C. G. Tsagas, C. G. Tsagas, C. Grojean, C. Misner, C. Ramírez, C. S. Chu, Chong-Sun Chu, D. R. Matravers, F. Lizzi, H. García-Compeán, H. Snyder, J. Gamboa, J. Hartle, J. J. Halliwell, J. W. Moffat, J. W. Moffat, K. V. Kuchar, L. M. Campbell, L. Susskind, M. Bañados, M. Cavaglia, M. Cavaglia, M. Chaichian, M. R. Douglas, M. Ryan, N. Grandi, N. Seiberg, O. Obregón, O. Obregón, O. Obregón, P. D. D'Eath, P. D. D'Eath, P. V. Moniz, R. Graham, S. Sinha, T. Banks, V. Schomerus   +43 more
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Noncommutative Quantum Cosmology [PDF]

General Relativity and Gravitation, 2004
We consider noncommutative quantum cosmology in the case of the low-energy string effective theory. Exacts solutions are found and compared with the commutative case.The Noncommutative quantum cosmology is considered in the case of the low-energy string ...
A. Connes, A.H. Chamseddine, C.S. Chu, César Mora, H. García-Compeán, J. Gamboa, J.E. Moyal, J.M. Carmona, J.M. Romero, Luis O. Pimentel, M. Gasperini, N. Seibert, V. Schomerus   +12 more
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Quantum cosmology: a review [PDF]

Reports on Progress in Physics, 2015
In quantum cosmology, one applies quantum physics to the whole universe. While no unique version and no completely well-defined theory is available yet, the framework gives rise to interesting conceptual, mathematical and physical questions.
M. Bojowald
semanticscholar   +6 more sources

Testing loop quantum cosmology [PDF]

, 2016
Loop quantum cosmology predicts that quantum gravity effects resolve the big-bang singularity and replace it by a cosmic bounce. Furthermore, loop quantum cosmology can also modify the form of primordial cosmological perturbations, for example by ...
E. Wilson-Ewing
semanticscholar   +5 more sources

Quantum Effects In Cosmology [PDF]

Classical and Quantum Gravity, 1993
Contents: Introduction. The Present State of the Universe. What Can We Expect From a Complete Cosmological Theory? An Overview of Quantum Effects in Cosmology. Parametric (Superadiabatic) Amplification of Classical Waves.
Belinsky V A, Fabbri R, Grishchuk L P, Grishchuk L P, Grishchuk L P, Grishchuk L P, Grishchuk L P, Grishchuk L P, Grishchuk L P, Grishchuk L P, Grishchuk L P, Grishchuk L P, Grishchuk L P, Grishchuk L P, Grishchuk L P, Grishchuk L P, Grishchuk L P, Grishchuk L P, Gunn J E, Guth A, Halliwell J J, Hartle J B, Hawking S W, Hawking S W, Krauss L M, L P Grishchuk, Lavrelashvili G V, Linde A D, Linde A D, Mukhanov V F, Peebles P J E, Rubakov V A, Starobinsky A A, Turner M S, Weinberg S, Wheeler J A, Zeldovich Ya B, Zeldovich Ya B, Zeldovich Ya B   +38 more
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Relational Quantum Cosmology [PDF]

, 2015
The application of quantum theory to cosmology raises a number of conceptual questions, such as the role of the quantum-mechanical notion of "observer" or the absence of a time variable in the Wheeler-DeWitt equation.
Vidotto, Francesca
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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
openalex   +4 more sources

Loop Quantum Cosmology [PDF]

Living Reviews in Relativity, 2005
Quantum gravity is expected to be necessary in order to understand situations where classical general relativity breaks down. In particular in cosmology one has to deal with initial singularities, i.e., the fact that the backward evolution of a classical
Bojowald Martin
doaj   +2 more sources

Time in quantum cosmology [PDF]

Physical Review D, 2016
A cosmological model with two global internal times shows that time reparameterization invariance, and therefore covariance, is not guaranteed by deparameterization.
M. Bojowald, Theodore Halnon
semanticscholar   +5 more sources

Quantum phantom cosmology [PDF]

Physical Review D, 2006
We apply the formalism of quantum cosmology to models containing a phantom field. Three models are discussed explicitly: a toy model, a model with an exponential phantom potential, and a model with phantom field accompanied by a negative cosmological ...
A. A. Starobinsky, Barbara Sandhöfer, C. Csaki, C. Kiefer, Claus Kiefer, E. Joos, H. D. Zeh, H. K. Jassal, M. Abramowitz, Mariusz P. Dąbrowski, P. Hájíček, S. W. Hawking   +11 more
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