Results 121 to 130 of about 258,058 (340)
Infinities in Quantum Gravities
Annalen der Physik, 2000 AbstractWe first present a review, intended for classical relativists, of the ultraviolet difficulties faced by local quantum gravity theories in both the usual Einstein versions and in their supergravity extensions, at least perturbatively. These problems, present in arbitrary dimensions, are traceable to the dimensionality of the Einstein constant.We
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A DIALOG ON QUANTUM GRAVITY [PDF]
International Journal of Modern Physics D, 2003 The debate between loop quantum gravity and string theory is sometime lively, and it is hard to present an impartial view on the issue. Leaving any attempt to impartiality aside, I report here, instead, a conversation on this issue, overheard in the cafeteria of a Major American University.
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Windows on Quantum Gravity [PDF]
Fortschritte der Physik, 2020 AbstractThese are notes for a graduate course in quantum gravity planned at IFT‐UAM/CSIC for the spring term of 2020, but delayed for an indefinite period of time (although a shortened version was given in the Escuela de Física (Institute of Physics) in the University of Costa Rica.). The aim of the course was to highlight the most important conceptual
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Environmental and Ecological Monitoring with Biodegradable Technologies
Advanced Science, EarlyView.This review examines the development and application of wireless biodegradable sensors for environmental monitoring. It explores (bio)degradable materials, their degradation mechanisms in various environments, and non‐toxic fabrication techniques. Additionally, it addresses scalable production and sustainable powering solutions, emphasizing the high ...
Mohammad Javad Bathaei +7 more
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Relational Lorentzian Asymptotically Safe Quantum Gravity: Showcase Model
UniverseIn a recent contribution, we identified possible points of contact between the asymptotically safe and canonical approaches to quantum gravity. The idea is to start from the reduced phase space (often called relational) formulation of canonical quantum ...
Renata Ferrero, Thomas Thiemann
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Nonlinear Quantum Gravity [PDF]
, 2012 Nonlinear quantum mechanics at the Planck scale can produce nonlocal effects contributing to resolution of singularities, to cosmic acceleration, and modified black-hole dynamics, while avoiding the usual causality issues.
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Advanced Science, EarlyView.This research investigates whether modern 3D glass printing can be used to develop advanced photonic crystal fibers suitable for supercontinuum generation. The team designs and fabricates a lead‐borate glass fiber with high nonlinearity, achieving an octave‐spanning spectrum in the mid‐infrared range.
Pawel Wienclaw +10 more
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European Physical Journal C: Particles and Fields, 2017 Applying the anholonomic frame deformation method, we construct various classes of cosmological solutions for effective Einstein–Yang–Mills–Higgs, and two measure theories.
Subhash Rajpoot, Sergiu I. Vacaru
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Lattice Quantum Gravity from Stochastic 3-Geometries
, 1995 I propose the Langevin equation for 3-geometries in the Ashtekar's formalism to describe 4D Euclidean quantum gravity, in the sense that the corresponding Fokker-Planck hamiltonian recovers the hamiltonian in 4D quantum gravity exactly.
Nakazawa, N.
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Foundations of Physics, 2019 This paper elaborates on an intrinsically quantum approach to gravity, which begins with a general framework for quantum mechanics and then seeks to identify additional mathematical structure on Hilbert space that is responsible for gravity and other phenomena.
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