Results 111 to 120 of about 640,772 (343)

Finite-distance gravitational deflection of massive particles by a rotating black hole in loop quantum gravity

European Physical Journal C: Particles and Fields, 2023
A rotating black hole in loop quantum gravity was constructed by Brahma, Chen, and Yeom based on a nonrotating counterpart using the revised Newman–Janis algorithm recently.
Yang Huang, Zhoujian Cao
doaj   +1 more source

Introduction to Loop Quantum Cosmology

Symmetry, Integrability and Geometry: Methods and Applications, 2012
This is an introduction to loop quantum cosmology (LQC) reviewing mini- and midisuperspace models as well as homogeneous and inhomogeneous effective dynamics.
Kinjal Banerjee, Gianluca Calcagni, Mercedes Martín-Benito   +2 more
doaj   +1 more source

Loop quantum gravity and the cyclic universe [PDF]

Physical Review D, 2004
6 pages, 4 figures; v2: minor changes to match PRD ...
Parampreet Singh, Parampreet Singh, Martin Bojowald, Roy Maartens   +3 more
openaire   +6 more sources

Mimicking Symmetry‐Breaking Einstein Ring by Optical Lens

Advanced Photonics Research, EarlyView.
This article uses an optical lens to emulate the gravitational lensing effect and observe the Einstein ring (ER) patterns. The symmetry‐breaking ER, i.e., Einstein cross, is observed utilizing a rotation‐symmetry‐breaking hemi‐ellipsoid lens. Deformed Einstein cross patterns induced by noncollinearly alignment of the light source–lens–observer are ...
Jun‐Liang Duan, Wen Xiao, Minyong Guo, Tong Liu, Huanyang Chen, Jin‐Hui Chen   +5 more
wiley   +1 more source

Quantum isolated horizons and black hole entropy

, 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, Lewandowski, Jerzy, Villaseñor, Eduardo J. S.   +2 more
core   +1 more source

Loop Quantum Cosmology IV: Discrete Time Evolution [PDF]

, 2000
Using general features of recent quantizations of the Hamiltonian constraint in loop quantum gravity and loop quantum cosmology, a dynamical interpretation of the constraint equation as evolution equation is presented. This involves a transformation from
, Ames W F, Ashtekar A, Ashtekar A, Ashtekar A, Bojowald M, Bojowald M, Bojowald M, Bojowald M, Bojowald M, Hawking S W, Isham C J, Kasner E, Lewandowski J, Martin Bojowald, Rovelli C, Thiemann T, Thiemann T   +17 more
core   +3 more sources

Evidence for loop quantum gravity

SSRN Electronic Journal, 2021
This article points out that when the boundary condition $\frac{T}{T_{c}}=z$ (when z is a complex number) is preset, bosons can produce Bose condensation without an energy layer. Under Bose condensation, incident waves may condense in various black holes in the theory of loop quantum gravity.
openaire   +3 more sources

Research Progress on Atmospheric Turbulence Perception and Correction Based on Adaptive Optics and Deep Learning

Advanced Photonics Research, EarlyView.
This work presents a systematic review of atmospheric turbulence fundamentals, including theoretical formulations and adaptive optics‐based mitigation strategies. This includes an in‐depth examination of the devices, theories, and methodologies associated with traditional correction approaches.
Qinghui Liu, Yihang Di, Mengmeng Zhang, Zhenbo Ren, Jianglei Di, Jianlin Zhao   +5 more
wiley   +1 more source

Quantum black holes in loop quantum gravity [PDF]

Classical and Quantum Gravity, 2014
20 pages.
Rodolfo Gambini, Javier Olmedo, Jorge Pullin   +2 more
openaire   +5 more sources

Rapid and Reversible Morphing to Enable Multifunctionality in Robots

Advanced Intelligent Systems, EarlyView.
This article introduces a rapid, reversible, and repeatable morphing robot through a bistable latch‐mediated, spring actuated (LaMSA) mechanism. This enables an untethered, multifunctional robot to near‐instantaneously (< 50 ms) and reversibly switch between a flying and driving configuration to navigate through different environments.
Brittan T. Wilcox, John Joyce, Michael D. Bartlett   +2 more
wiley   +1 more source