Results 21 to 30 of about 115,765 (198)

Modular quantum cosmology [PDF]

Classical and Quantum Gravity, 1999
Latex, 23 pages, 1 figure.
Bertolami, Orfeu, Schiappa, Ricardo
openaire   +3 more sources

Modern cosmology: 100 years of quantum science [PDF]

Kragujevac Journal of Science
In this article, we contribute to the special issue of the Kragujevac Journal of Science devoted to the International Year of Quantum Science and Technology (IYQ2025). We discuss several connections between Quantum Theory and Modern Cosmology.
Dimitrijević Dragoljub D., Đorđević Goran S.   +1 more
doaj   +1 more source

Quantum Nature of the Big Bang: Improved dynamics [PDF]

, 2006
An improved Hamiltonian constraint operator is introduced in loop quantum cosmology. Quantum dynamics of the spatially flat, isotropic model with a massless scalar field is then studied in detail using analytical and numerical methods.
A. Ashtekar, A. Ashtekar, A. Ashtekar, Abhay Ashtekar, C. Rovelli, C. Rovelli, K. Vandersloot, M. Bojowald, M. Bojowald, N. M. J. Woodhouse, Parampreet Singh, Tomasz Pawlowski   +11 more
core   +3 more sources

Ψ-epistemic quantum cosmology? [PDF]

Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics, 2016
This paper provides a prospectus for a new way of thinking about the wavefunction of the universe: a $\Psi$-epistemic quantum cosmology. We present a proposal that, if successfully implemented, would resolve the cosmological measurement problem and simultaneously allow us to think sensibly about probability and evolution in quantum cosmology.
Evans, P.W., Gryb, S., Gryb, S., Thebault, K.P.Y.   +3 more
openaire   +5 more sources

Quantum cosmological backreactions. III. Deparametrized quantum cosmological perturbation theory

Physical Review D, 2022
This is the third paper in a series of four in which we use space adiabatic methods in order to incorporate backreactions among the homogeneous and between the homogeneous and inhomogeneous degrees of freedom in quantum cosmological perturbation theory.
S. Schander, T. Thiemann
openaire   +3 more sources

L'emergenza dello spazio-tempo nella gravità quantistica e nella cosmologia quantistica

Philosophy Kitchen, 2019
Our best description of spacetime is provided by general relativity – yet, this theory is not thought to be fundamental. Instead, it is expected to be replaced by a theory of quantum gravity, which may not feature spacetime fundamentally.
Karen Crowther
doaj   +1 more source

(b,v)-type variables for black to white hole transitions in effective loop quantum gravity

Physics Letters B, 2021
Quantum gravity effects in effective models of loop quantum gravity, such as loop quantum cosmology, are encoded in the choice of so-called polymerisation schemes.
Norbert Bodendorfer, Fabio M. Mele, Johannes Münch   +2 more
doaj   +1 more source

Quantum cosmological backreactions. IV. Constrained quantum cosmological perturbation theory

Physical Review D, 2022
This is the fourth paper in a series of four in which we use space adiabatic methods in order to incorporate backreactions among the homogeneous and between the homogeneous and inhomogeneous degrees of freedom in quantum cosmological perturbation theory.
S. Schander, T. Thiemann
openaire   +3 more sources

Loop Quantum Cosmology, Modified Gravity and Extra Dimensions

Universe, 2016
Loop quantum cosmology (LQC) is a framework of quantum cosmology based on the quantization of symmetry reduced models following the quantization techniques of loop quantum gravity (LQG).
Xiangdong Zhang
doaj   +1 more source

Perfect Quantum Cosmological Bounce [PDF]

Physical Review Letters, 2016
5 pages, revtex, APS style, 1 figure.
Gielen, S., Turok, N.
openaire   +8 more sources