Results 131 to 140 of about 137,892 (317)
A possible quantum gravity hint in binary black hole merger
Physics Letters BWe present a semi-rigorous justification of Bekenstein's Generalized Second Law of Thermodynamics applicable to a universe with black holes present, based on a generic quantum gravity formulation of a black hole spacetime, where the bulk Hamiltonian ...
Parthasarathi Majumdar
doaj +1 more source
Fusion basis for lattice gauge theory and loop quantum gravity [PDF]
, 2016 A bstractWe introduce a new basis for the gauge-invariant Hilbert space of lattice gauge theory and loop quantum gravity in (2 + 1) dimensions, the fusion basis.
C. Delcamp, B. Dittrich, A. Riello
semanticscholar +1 more source
Introduction to Loop Quantum Gravity and Cosmology [PDF]
, 2013 30 pages, 2 figures.
openaire +4 more sources
Nuclear Physics B, 1992 We prove the existence of a nonrenormalizable infinity in the two-loop effective action of perturbative quantum gravity by means of an explicit calculation. Our final result agrees with that obtained by earlier authors. We use the background-field method in coordinate space, combined with dimensional regularization and a heat kernel representation for ...
Anton E.M. van de Ven +1 more
openaire +3 more sources
Advancements in Machine Learning for Microrobotics in Biomedicine
Advanced Intelligent Systems, EarlyView.Microrobotics is an innovative technology with great potential for noninvasive medical interventions. However, controlling and imaging microrobots pose significant challenges in complex environments and in living organisms. This review explores how machine learning algorithms can address these issues, offering solutions for adaptive motion control and ...
Amar Salehi +6 more
wiley +1 more source
Statistical and entanglement entropy for black holes in quantum geometry
, 2014 We analyze the relationship between entanglement (or geometric) entropy with statistical mechanical entropy of horizon degrees of freedom when described in the framework of isolated horizons in loop quantum gravity.
Perez, Alejandro
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Einstein Equation from Covariant Loop Quantum Gravity in Semiclassical Continuum Limit [PDF]
, 2017 In this paper we explain how 4-dimensional general relativity and in particular, the Einstein equation, emerge from the spinfoam amplitude in loop quantum gravity.
Muxin Han
semanticscholar +1 more source
Advanced Intelligent Systems, Volume 7, Issue 3, March 2025.An electromagnetic manipulation system enhances magnetic field strength in the Z‐direction for 3D control of microrobots and nanoparticles. Featuring eight metal‐core coils and two air‐core coils arranged hemispherically, it ensures unimpeded workspace access and integrates imaging tools.
Nader Latifi Gharamaleki +4 more
wiley +1 more source
Living Reviews in Relativity, 2008 Quantum gravity is expected to be necessary in order to understand situations in which classical general relativity breaks down. In particular in cosmology one has to deal with initial singularities, i.e., the fact that the backward evolution of a ...
Bojowald Martin
doaj
Cosmological Constant from Condensation of Defect Excitations
Universe, 2018 A key challenge for many quantum gravity approaches is to construct states that describe smooth geometries on large scales. Here we define a family of (2+1)-dimensional quantum gravity states which arise from curvature excitations concentrated at point ...
Bianca Dittrich
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