Results 41 to 50 of about 2,706,843 (321)
An effective matrix model for dynamical end of the world branes in Jackiw-Teitelboim gravity
Journal of High Energy Physics, 2022 We study Jackiw-Teitelboim gravity with dynamical end of the world branes in asymptotically nearly AdS2 spacetimes. We quantize this theory in Lorentz signature, and compute the Euclidean path integral summing over topologies including dynamical branes ...
Ping Gao +2 more
doaj +1 more source
Operators of quantum-reduced loop gravity from the perspective of full loop quantum gravity [PDF]
Phys. Rev. D 102, 106010 (2020), 2020 Quantum-reduced loop gravity is a model of loop quantum gravity, which - from the technical point of view - is characterized by the remarkably simple form of its basic operators. In this article we examine the operators of the quantum-reduced model from the perspective of full loop quantum gravity.
arxiv +1 more source
Thin accretion disk images of the black hole in symmergent gravity [PDF]
Class. Quantum Grav. 40 (2023) 184001, 2023 In this paper, we study circular orbits, effective potential, and thin-accretion disk of a black hole in symmergent gravity within the Novikov-Thorne model in a way including the energy flux and temperature distribution. We determine bounds on symmergent gravity parameters and conclude that the accretion disk could be used as an astrophysical tool to ...
arxiv +1 more source
An Aerial–Aquatic Hitchhiking Robot with Remora‐Inspired Tactile Sensors and Thrust Vectoring Units
Advanced Intelligent Systems, EarlyView., 2023 An untethered aerial–aquatic hitchhiking robot that can be remotely controlled for flying, swimming, and transiting air–water boundaries rapidly (0.16 s), is presented. Notably, it can autonomously attach to various surfaces in both air and water environments using a remora‐inspired suction disc with flexible tactile sensors.
Lei Li +12 more
wiley +1 more source
Tunneling Analysis Under the Influences of Einstein-Gauss-Bonnet Black Holes Gravity Theory [PDF]
, 2021 We consider an equation of motion for Glashow-Weinberg-Salam model and apply the semiclassical Hamilton-Jacobi process and WKB approximation in order to compute the tunneling probability of W-bosons in the background of electromagnetic field to analyze the quantum gravity effects of charged black hole(BH) in Einstein-Gauss-Bonnet gravity theory.
arxiv +1 more source
Clocks and dynamics in quantum models of gravity [PDF]
Classical and Quantum Gravity, 2017 28 pages, 8 figures, largely improved ...
openaire +7 more sources
On 2D quantum gravity coupled to a σ-model [PDF]
Nuclear Physics B - Proceedings Supplements, 1996 This contribution is a review of the method of isomonodromic quantization of dimensionally reduced gravity. Our approach is based on the complete separation of variables in the isomonodromic sector of the model and the related ``two-time" Hamiltonian structure.
Korotkin, D., Nicolai, H., Samtleben, H.
openaire +4 more sources
Quantum gravity as a group field theory: a sketch [PDF]
J.Phys.Conf.Ser. 33 (2006) 271-278, 2005 We give a very brief introduction to the group field theory approach to quantum gravity, a generalisation of matrix models for 2-dimensional quantum gravity to higher dimension, that has emerged recently from research in spin foam models.
arxiv +1 more source
Spin foam models for quantum gravity [PDF]
Classical and Quantum Gravity, 2003 In this article we review the present status of the spin foam formulation of non-perturbative (background independent) quantum gravity. The article is divided in two parts. In the first part we present a general introduction to the main ideas emphasizing their motivations from various perspectives.
openaire +3 more sources
2D gravitational Mabuchi action on Riemann surfaces with boundaries
Journal of High Energy Physics, 2017 We study the gravitational action induced by coupling two-dimensional non-conformal, massive matter to gravity on a Riemann surface with boundaries. A small-mass expansion gives back the Liouville action in the massless limit, while the first-order mass ...
Adel Bilal, Corinne de Lacroix
doaj +1 more source