Results 81 to 90 of about 137,892 (317)

Gravitational Lensing Effects from Models of Loop Quantum Gravity with Rigorous Quantum Parameters

open access: yesUniverse
Many previous works have studied gravitational lensing effects from Loop Quantum Gravity. So far, gravitational lensing effects from Loop Quantum Gravity have only been studied by choosing large quantum parameters much larger than the Planck scale ...
Haida Li, Xiangdong Zhang
doaj   +1 more source

Loop Quantum Gravity Phenomenology: Linking Loops to Observational Physics

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2012
Research during the last decade demonstrates that effects originating on the Planck scale are currently being tested in multiple observational contexts.
Florian Girelli   +2 more
doaj   +1 more source

Quantum isolated horizons and black hole entropy

open access: yes, 2012
We give a short introduction to the approaches currently used to describe black holes in loop quantum gravity. We will concentrate on the classical issues related to the modeling of black holes as isolated horizons, give a short discussion of their ...
G., J. Fernando Barbero   +2 more
core   +1 more source

How the Jones Polynomial Gives Rise to Physical States of Quantum General Relativity [PDF]

open access: yes, 1992
Solutions to both the diffeomorphism and the hamiltonian constraint of quantum gravity have been found in the loop representation, which is based on Ashtekar's new variables.
A. Ashtekar   +16 more
core   +4 more sources

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

Improved μ¯ -scheme effective dynamics of full loop quantum gravity [PDF]

open access: yes, 2019
We propose a new derivation from the full Loop Quantum Gravity (LQG) to the Loop Quantum Cosmology (LQC) improved $\bar{\mu}$-scheme effective dynamics, based on the reduced phase space formulation of LQG and a proposal of effective Hamiltonian/action in
Muxin Han, Hongguang Liu
semanticscholar   +1 more source

Lectures on Loop Quantum Gravity [PDF]

open access: yes, 2003
90 pages, Latex, 18 figures, uses graphicx and pstricks for coloured text and graphics, based on lectures given at the 271st WE Heraeus Seminar ``Aspects of Quantum Gravity: From Theory to Experimental Search'', Bad Honnef, Germany, February 25th -- March 1st, to appear in Lecture Notes in ...
openaire   +5 more sources

Synthetic Aspects and Characterization Needs in MOF Chemistry – from Discovery to Applications

open access: yesAdvanced Materials, EarlyView.
Overcoming the challenges of phase discovery, synthesis optimization and scale‐up, characterization, and computational studies is essential to accelerate the large‐scale application of MOFs. Life‐cycle analyses and techno‐economic analyses need to be performed to realistically assess their potential for industrial relevance.
Bastian Achenbach   +4 more
wiley   +1 more source

Loop quantum cosmology and singularities

open access: yesScientific Reports, 2017
Loop quantum gravity is believed to eliminate singularities such as the big bang and big crunch singularity. This belief is based on studies of so-called loop quantum cosmology which concerns symmetry-reduced models of quantum gravity. In this paper, the
Ward Struyve
doaj   +1 more source

Polytopes in all dimensional loop quantum gravity

open access: yesEuropean Physical Journal C: Particles and Fields, 2022
The Lasserre’s reconstruction algorithm is extended to the D-polytopes with the construction of their shape space. Thus, the areas of d-skeletons $$(1\le d\le D)$$ ( 1 ≤ d ≤ D ) can be expressed as functions of the areas and normal bi-vectors of the (D-1)
Gaoping Long, Yongge Ma
doaj   +1 more source

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