Results 131 to 140 of about 2,756,107 (244)

Cosmic Inflation, Quantum Information and the Pioneering Role of John S Bell in Cosmology

Universe, 2019
According to the theory of cosmic inflation, the large scale structures observed in our Universe (galaxies, clusters of galaxies, Cosmic Background Microwave—CMB—anisotropy…) are of quantum mechanical origin. They are nothing but vacuum
Jérôme Martin
doaj   +1 more source

Specialized computer algebra system for application in general relativity [PDF]

arXiv, 2007
A brief characteristic of the specialized computer algebra system GRG_EC intended for symbolic computations in the field of general relativity is given.
arxiv  

Classical and Quantum Anisotropic Wormholes in Pure General Relativity [PDF]

arXiv, 1997
In the homogeneous and isotropic Friedmann-Robertson-Walker minisuperspace model, it is known that there are no Euclidean wormhole solutions in the pure gravity system. Here it is demonstrated explicitly that in Taub cosmology, which is one of the simplest anisotropic cosmology models, wormhole solutions do exist in pure general relativity in both ...
arxiv  

Brane-World Gravity

Living Reviews in Relativity, 2010
The observable universe could be a 1+3-surface (the “brane”) embedded in a 1+3+d-dimensional spacetime (the “bulk”), with Standard Model particles and fields trapped on the brane while gravity is free to access the bulk.
Roy Maartens, Kazuya Koyama
doaj  

A new track for unifying general relativity with quantum field theories [PDF]

arXiv, 2005
In the perspective of unifying quantum field theories with general relativity,the equations of the internal dynamics of the vacuum and mass structures of a set of interacting particles are proved to be in one-to-one correspondence with the equations of general relativity.
arxiv  

Axiomatic formulations of modified gravity theories with nonlinear dispersion relations and Finsler–Lagrange–Hamilton geometry

European Physical Journal C: Particles and Fields, 2018
We develop an axiomatic geometric approach and provide an unconventional review of modified/nonlinear gravity theories, MGTs, with modified dispersion relations, MDRs, encoding Lorentz invariance violations, LIVs, classical and quantum random effects ...
Laurenţiu Bubuianu, Sergiu I. Vacaru
doaj   +1 more source

On some toy quantum cosmology [PDF]

arXiv, 2010
Some connections of the quantum potential to gravitation are discussed.
arxiv  

Averaging Problem in Cosmology and Macroscopic Gravity [PDF]

Online Proceedings of the Atlantic Regional Meeting on General Relativity and Gravitation, Fredericton, NB, Canada, May 2006, ed. R.J. McKellar (http://www.math.unb.ca/atgr/, University of New Brunswick, 2006), 2007
The Averaging problem in general relativity and cosmology is discussed. The approach of macroscopic gravity to resolve the problem is presented. An exact cosmological solution to the equations of macroscopic gravity is given and its properties are discussed. Contents: 1. Introduction to General Relativity 2.
arxiv  

Anomaly-induced effective action and Chern–Simons modification of general relativity

Physics Letters B, 2015
Recently it was shown that the quantum vacuum effects of massless chiral fermion field in curved space–time leads to the parity-violating Pontryagin density term, which appears in the trace anomaly with imaginary coefficient.
Sebastião Mauro, Ilya L. Shapiro
doaj  

William Wainwright on the Rational Assessment of the Christian Worldview: Between Rationalism and Relativism

Religious Studies Review, Volume 51, Issue 1, Page 35-77, March 2025.
Kai‐man Kwan
wiley   +1 more source