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NONCOMMUTATIVE QUANTUM MECHANICS AND QUANTUM COSMOLOGY [PDF]

International Journal of Modern Physics A, 2009
We present a phase-space noncommutative version of quantum mechanics and apply this extension to Quantum Cosmology. We motivate this type of noncommutative algebra through the gravitational quantum well (GQW) where the noncommutativity between momenta is shown to be relevant. We also discuss some qualitative features of the GQW such as the Berry phase.
Bastos, Catarina, Bertolami, Orfeu, Dias, Nuno Costa, Prata, João Nuno   +3 more
openaire   +3 more sources

Thermodynamics in Loop Quantum Cosmology

Advances in High Energy Physics, 2009
Loop quantum cosmology (LQC) is very powerful to deal with the behavior of early universe. Moreover, the effective loop quantum cosmology gives a successful description of the universe in the semiclassical region.
Li-Fang Li, Jian-Yang Zhu
doaj   +1 more source

Correspondence between dark energy quantum cosmology and Maxwell equations

European Physical Journal C: Particles and Fields, 2019
A Friedmann–Robertson–Walker cosmology with dark energy can be modelled using a quintessence field. That system is equivalent to a relativistic particle moving on a two-dimensional conformal spacetime.
Felipe A. Asenjo, Sergio A. Hojman
doaj   +1 more source

Hořava-Lifshitz Scalar Field Cosmology: Classical and Quantum Viewpoints

Advances in High Energy Physics, 2021
In this paper, we study a projectable Hořava-Lifshitz cosmology without the detailed balance condition minimally coupled to a nonlinear self-coupling scalar field.
Fatimah Tavakoli, Babak Vakili, Hossein Ardehali   +2 more
doaj   +1 more source

Testing loop quantum cosmology [PDF]

, 2017
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 ...
Wilson-Ewing, Edward
core   +2 more sources

Quantum cosmological models [PDF]

Classical and Quantum Gravity, 2005
revised: now includes time asymmetry, black hole final state etc, 71 ...
openaire   +3 more sources

Isotropic Loop Quantum Cosmology [PDF]

, 2002
Isotropic models in loop quantum cosmology allow explicit calculations, thanks largely to a completely known volume spectrum, which is exploited in order to write down the evolution equation in a discrete internal time.
, Ames W F, Ashtekar A, Ashtekar A, Ashtekar A, Ashtekar A, Baez J C, Bahcall J N, Bojowald M, Bojowald M, Bojowald M, Bojowald M, Bojowald M, Bojowald M, Bojowald M, Gurovich V Ts, Hawking S W, Immirzi G, Kuchar K V, Martin Bojowald, Rovelli C, Thiemann T, Thiemann T, Thiemann T, Veneziano G, Witten E   +25 more
core   +3 more sources

Quantum Effects In Cosmology [PDF]

, 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
core   +2 more sources

Mass of Cosmological Perturbations in the Hybrid and Dressed Metric Formalisms of Loop Quantum Cosmology for the Starobinsky and Exponential Potentials

Universe, 2022
The hybrid and the dressed metric formalisms for the study of primordial perturbations in Loop Quantum Cosmology lead to dynamical equations for the modes of these perturbations that are of a generalized harmonic-oscillator type, with a mass that depends
Simon Iteanu, Guillermo A. Mena Marugán
doaj   +1 more source

Observational Exclusion of a Consistent Quantum Cosmology Scenario

, 2015
It is often argued that inflation erases all the information about what took place before it started. Quantum gravity, relevant in the Planck era, seems therefore mostly impossible to probe with cosmological observations.
Barrau, Aurelien, Bolliet, Boris, Grain, Julien, Schander, Susanne   +3 more
core   +3 more sources