Results 31 to 40 of about 120,147 (251)

Loop Quantum Cosmology, Modified Gravity and Extra Dimensions

open access: yesUniverse, 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

Quantum Gravity Effects in Cosmology

open access: yesEPJ Web of Conferences, 2018
Within the geometrodynamic approach to quantum cosmology, we studied the quantum gravity effects in cosmology. The Gibbons-Hawking temperature is corrected by quantum gravity due to spacetime fluctuations and the power spectrum as well as any probe field
Gu Je-An, Pyo Kim Sang, Shen Che-Min
doaj   +1 more source

Tachyon field in loop cosmology

open access: yesPhysics 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

Effective Field Theory of Loop Quantum Cosmology

open access: yesUniverse, 2019
Quantum cosmology is traditionally formulated in a minisuperspace setting, implicitly averaging fields over space to obtain homogeneous models. For universal reasons related to the uncertainty principle, quantum corrections then depend on the size of the
Martin Bojowald
doaj   +1 more source

Loop cosmological dynamics and dualities with Randall-Sundrum braneworlds [PDF]

open access: yes, 2006
The discrete quantum geometric effects play an important role in dynamical evolution in the loop quantum cosmology. These effects which are significant at the high energies lead to the quadratic energy density modifications to the Friedmann equation, as ...
A. Ashtekar   +6 more
core   +3 more sources

On the holographic basis of loop quantum cosmology

open access: yesEuropean Physical Journal C: Particles and Fields, 2018
In this work, we obtain the loop quantum cosmology dynamical equations, plus a positive cosmological constant, from the Bekenstein–Hawking entropy-area relation given by Loop Quantum Black Holes, by the use of the Jacobson formalism (Phys Rev Lett 75 ...
C. A. S. Silva
doaj   +1 more source

Pytanie o jedność nauki na przykładzie kosmologii antropicznej

open access: yesStudia Philosophiae Christianae, 2023
Given the ongoing process of the differentiation of sciences, it is worth posing a question about the possibility of them being integrated. This matter will be explored with reference to anthropic cosmology.
Sławomir Leciejewski
doaj   +1 more source

A Brief Introduction to Loop Quantum Cosmology [PDF]

open access: yes, 2009
In recent years, Loop Quantum Gravity has emerged as a solid candidate for a nonperturbative quantum theory of General Relativity. It is a background independent theory based on a description of the gravitational field in terms of holonomies and fluxes ...
Marugan, Guillermo A. Mena
core   +2 more sources

Noncommutative quantum cosmology

open access: yesJournal of Physics: Conference Series, 2009
Proceedings of DICE2008, Castiglioncello, 22nd-26th September 2008 ...
Bastos, C.   +3 more
openaire   +2 more sources

Home - About - Disclaimer - Privacy