Results 71 to 80 of about 3,971 (207)

Quantum Gravity: A Primer for Philosophers. [PDF]

open access: yes, 2008
‘Quantum Gravity’ does not denote any existing theory: the field of quantum gravity is very much a ‘work in progress’. As you will see in this chapter, there are multiple lines of attack each with the same core goal: to find a theory that unifies, in ...
Rickles, Dean
core  

Black hole thermodynamics: general relativity and beyond

open access: yes, 2019
Black holes have often provided profound insights into the nature of gravity and the structure of space–time. The study of the mathematical properties of black objects is a major research theme of contemporary theoretical physics.
Sarkar, Sudipta, Sudipta Sarkar
core   +1 more source

THE THEORY OF RELATIVITY: ITS IMPACT ON MODERN PHYSICS

open access: yesWorldwide Journal of Physics, 2023
The Theory of Relativity, encompassing both Special and General Relativity, has profoundly reshaped the foundations of modern physics. This paper investigates the theoretical underpinnings and far-reaching consequences of Einstein’s revolutionary ideas ...
Iqbal Ahmed   +2 more
doaj  

On Tensorial Concomitants and the Non-Existence of a Gravitational Stress-Energy Tensor [PDF]

open access: yes, 2009
Based on an analysis of what it may mean for one tensor to depend in the proper way on another, I prove that, under certain natural conditions, there can be no tensor whose interpretation could be that it represents gravitational stress-energy in general
Curiel, Erik
core  

What can we Learn about the Ontology of Space and Time from the Theory of Relativity [PDF]

open access: yes, 2012
This chapter presents an opinionated assessment of what we can learn about the ontology of space and time from the special and general theories of relativity.
Norton, John D.
core  

Constraints on Gravitation from Causality and Quantum Consistency

open access: yesAdvances in High Energy Physics, 2018
We examine the role of consistency with causality and quantum mechanics in determining the properties of gravitation. We begin by examining two different classes of interacting theories of massless spin 2 particles—gravitons.
Mark P. Hertzberg
doaj   +1 more source

Generalization of Einstein’s gravitational field equations

open access: yesEuropean Physical Journal C: Particles and Fields, 2017
The Riemann tensor is the cornerstone of general relativity, but as is well known it does not appear explicitly in Einstein’s equation of gravitation. This suggests that the latter may not be the most general equation. We propose here for the first time,
Frédéric Moulin
doaj   +1 more source

GUP parameter from quantum corrections to the Newtonian potential

open access: yesPhysics Letters B, 2017
We propose a technique to compute the deformation parameter of the generalized uncertainty principle by using the leading quantum corrections to the Newtonian potential.
Fabio Scardigli   +2 more
doaj   +1 more source

Entropy Production and Equilibrium Conditions of General-Covariant Spin Systems

open access: yesEntropy, 2015
In generalizing the special-relativistic one-component version of Eckart’s continuum thermodynamics to general-relativistic space-times with Riemannian or post-Riemannian geometry as presented by Schouten (Schouten, J.A.
Wolfgang Muschik   +1 more
doaj   +1 more source

Physics for philosophers: Relativity Principle, Inertial Law and faith in what is impossible.

open access: yesBajo Palabra, 2018
An attainable way to understand why we must reasonably doubt about a definite aspect of Albert Einstein´s geometric theory of gravitation, when he denies the character of force for gravity, is throughout the history of Relativity Principle and Inertial ...
Jorge León de la Vega
doaj   +1 more source

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