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We describe gauge theories which allow to retrieve a large class of gravitational theories, including, MacDowell-Mansouri gravity and its topological extension to Loop Quantum Gravity via the Pontrjagin characteristic class involving the…

广义相对论与量子宇宙学 · 物理学 2026-01-07 J. Thibaut , S. Lazzarini

We obtain the matter-graviton scattering amplitude in the gravitational theory of quadratic curvature, which has $R_{\mu\nu}^2$ term in the action. Unitarity bound is not satisfied because of the existence of negative norm states, while an…

高能物理 - 理论 · 物理学 2023-04-12 Yugo Abe , Takeo Inami , Keisuke Izumi

We construct a general relativity formula for the law of gravity for material bodies. The formula contains three numeric parameters that are to be determined experimentally. If they are chosen from symmetry considerations, then the theory…

数学物理 · 物理学 2007-05-23 N. N. Chaus

Einstein said that gravity is an acceleration like any other acceleration. But gravity causes relativistic effects at non-relativistic speeds; so gravity could have relativistic origins. And since the strong force is thought to cause most…

综合物理 · 物理学 2019-10-24 Michael Byrne

We try to lay down the foundations of a Newtonian theory where inertia and gravitational fields appear in a unified way aiming to reach a better understanding of the general relativistic theory. We also formulate a kind of equivalence…

广义相对论与量子宇宙学 · 物理学 2015-06-11 Xavier Jaén , Alfred Molina

The more precise definition and the more fundamental understanding of the concepts of time, energy, entropy and information are building upon the new, relativistic foundation of gravity. This lecture is an attempt to explain the basic…

广义相对论与量子宇宙学 · 物理学 2023-11-17 Tomi Koivisto

Starting with Newton's law of universal gravitation, we generalize it step-by-step to obtain Einstein's geometric theory of gravity. Newton's gravitational potential satisfies the Poisson equation. We relate the potential to a component of…

广义相对论与量子宇宙学 · 物理学 2013-09-20 Donald H. Kobe , Ankit Srivastava

The Euclidean quantum amplitude to go between data specified on an initial and a final hypersurface may be approximated by the tree amplitude exp(-I_{classical}/\hbar), where I_{classical} is the Euclidean action of the classical solution…

广义相对论与量子宇宙学 · 物理学 2014-11-17 Peter D'Eath , Andrew Sornborger

A theory of 3-space explains the phenomenon of gravity as arising from the time-dependence and inhomogeneity of the differential flow of this 3-space. The emergent theory of gravity has two gravitational constants: G - Newton's constant,…

综合物理 · 物理学 2007-05-23 Reginald T. Cahill

We construct the non-linear realisation of the semi-direct product of the very extended algebra A1+++ and its vector representation. This theory has an infinite number of fields that depend on a spacetime with an infinite number of…

高能物理 - 理论 · 物理学 2020-06-10 Keith Glennon , Peter West

We determine the electrostatic self-force at rest in an arbitrary static metric with cylindrical symmetry in the linear approximation in the Newtonian constant. In linearised Einstein theory, we express it in terms of the components of the…

广义相对论与量子宇宙学 · 物理学 2009-10-28 B. Boisseau , C. Charmousis , B. Linet

It is assumed that, for weak spacetime curvature, the main gravitational effect of the quantum vacuum stress-energy corresponds to adding two terms to the Einstein-Hilbert action, proportional to the square of the curvature scalar and to…

广义相对论与量子宇宙学 · 物理学 2010-04-23 Emilio Santos

We provide a quantum derivation of Einstein's Weak Equivalence Principle (WEP) of general relativity using a new quantum gravity theory proposed by the authors called Electro-Magnetic Quantum Gravity or EMQG (ref. 1). Newtonian Inertia is a…

综合物理 · 物理学 2007-05-23 Tom Ostoma , Mike Trushyk

Newton's second law: "force = time-derivative of momentum", may also be defined for theories of gravitation endowing space-time with a curved metric. Thus, Einstein's assumption of a geodesic motion may be rewritten in that form, and it…

综合物理 · 物理学 2007-05-23 Mayeul Arminjon

In quantum gauge theory of gravity, the gravitational field is represented by gravitational gauge field. The field strength of gravitational gauge field has both gravitational electric component and gravitational magnetic component. In…

广义相对论与量子宇宙学 · 物理学 2014-11-17 Ning Wu

In this paper, we derive the Einstein's field equation (EFE) by considering an non-commuting two dimensional quantized space, which can be excited by absorbing energy. Any variation of the energy level of space quantas, will result in a…

广义相对论与量子宇宙学 · 物理学 2020-01-16 Ramin Hassannejad , S. Navid Mousavi

A recent proposal asserts that gravitational forces arise due to an interaction between matter and vacuum electromagnetic zero-point radiation. The present analysis demonstrates that forces induced on matter by zero-point radiation arise in…

综合物理 · 物理学 2007-05-23 C. T. Ridgely

Atomic interferometry methods used to measure the Newtonian gravitational constant. To improve the accuracy, one should measure the phase of an atomic interferometer at extreme values of atomic vertical velocities and coordinates. Owing to…

原子物理 · 物理学 2021-02-10 B. Dubetsky

We consider a linearized, effective quantum theory of gravitation in which gravity weakens at energies higher than ~10^-3 eV in order to accommodate the apparent smallness of the cosmological constant. Such a theory predicts departures from…

天体物理学 · 物理学 2008-11-26 R. R. Caldwell , Daniel Grin

It has been shown [1,2] that the electromagnetic quantum vacuum makes a contribution to the inertial mass, $m_i$, in the sense that at least part of the inertial force of opposition to acceleration, or inertia reaction force, springs from…

广义相对论与量子宇宙学 · 物理学 2007-05-23 Alfonso Rueda , Bernard Haisch , Roh Tung