Results 21 to 30 of about 39,130 (174)

Loop Quantum Cosmology I: Kinematics [PDF]

Classical and Quantum Gravity, 1999
The framework of quantum symmetry reduction is applied to loop quantum gravity with respect to transitively acting symmetry groups. This allows to test loop quantum gravity in a large class of minisuperspaces and to investigate its features - e.g.
Ashtekar A, Ashtekar A, Ashtekar A, Barbero G J F, Bojowald M, Bojowald M, Bojowald M Loop Quantum cosmology III: Wheeler-DeWitt operators, Ellis G F R, Ellis G F R, Kobayashi S, Kobayashi S, Kodama H, Lidsey J E, MacCallum M A H, Martin Bojowald, Polchinski J, Rovelli C, Smolin L, Thiemann T, Thiemann T, Thiemann T, Thiemann T, Torre C G   +22 more
core   +3 more sources

Tomography in loop quantum cosmology [PDF]

The European Physical Journal Plus, 2022
We analyze the tomographic representation for the Friedmann-Robertson-Walker (FRW) model within the Loop Quantum Cosmology framework. We focus on the Wigner quasi-probability distributions associated with Gaussian and Schrödinger cat states, and then, by applying a Radon integral transform for those Wigner functions, we are able to obtain the ...
Jasel Berra–Montiel, Alberto Molgado
openaire   +2 more sources

Singularities in Loop Quantum Cosmology [PDF]

Physical Review Letters, 2008
5 pages, 3 figures. v2: Comments and references added.
Cailleteau, T., Cardoso, Antonio, Vandersloot, K., Wands, David   +3 more
openaire   +5 more sources

Is a loopy and noncommutative early Universe viable?

Physics Letters B, 2023
We conduct a (pre-)inflationary dynamics study of the chaotic quadratic potential within the framework of a simple noncommutative extension of effective loop quantum cosmology put forward recently.
Luis Rey Díaz-Barrón, Abraham Espinoza-García, S. Pérez-Payán, J. Socorro   +3 more
doaj   +1 more source

Tachyon field in loop cosmology

Physics Letters B, 2020
The evolutionary pictures of tachyon field in modified loop cosmology have been investigated. We present the dynamical behavior of the tachyon field associated with an exponential potential and find that the pre-inflation dynamics are very similar in ...
Kui Xiao
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

Inflation in loop quantum cosmology [PDF]

Physical Review D, 2019
18 pages, 6 tables.
Bhardwaj, Anshuman, Copeland, Edmund J., Louko, Jorma   +2 more
openaire   +2 more sources

The mass of cosmological perturbations in Loop Quantum Cosmology

The Fifteenth Marcel Grossmann Meeting, 2022
Sixth Tux workshop on Quantum Gravity. Monday, February 19 to Friday, February 23. Tux, Austria (2018). ..-https://www.gravity.physik.fau.de/events/tux6/
Mena Marugán, Guillermo A., Elizaga Navascués, Beatriz, Martín de Blas, Daniel   +2 more
openaire   +2 more sources

Polymer Dynamics of Isotropic Universe in Ashtekar and in Volume Variables

Universe, 2022
We analyze the semiclassical and quantum polymer dynamics of the isotropic Universe in terms of both the standard Ashtekar-Barbero-Immirzi connection and its conjugate momentum and also of the new generalized coordinate conjugate to the Universe volume ...
Eleonora Giovannetti, Gabriele Barca, Federico Mandini, Giovanni Montani   +3 more
doaj   +1 more source

Superinflation in loop quantum cosmology [PDF]

Physical Review D, 2008
11 pages, 2 figures.
Copeland, E. J., Mulryne, D. J., Nunes, N. J., Shaeri, M.   +3 more
openaire   +2 more sources