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Four-force
About: Four-force is a research topic. Over the lifetime, 3459 publications have been published within this topic receiving 87308 citations.
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TL;DR: In this article, a test particle with spin possessing a canonical energy-momentum tensor with a nonvanishing antisymmetric part is used to measure torsion.
134 citations
TL;DR: In this paper, the unimodular theory of gravitation is compared with general relativity in the quadratic (Fierz-Pauli) regime, using a quite broad framework, and it is argued that quantum effects allow in principle to discriminate between both theories.
Abstract: The so called unimodular theory of gravitation is compared with general relativity in the quadratic (Fierz-Pauli) regime, using a quite broad framework, and it is argued that quantum effects allow in principle to discriminate between both theories.
133 citations
Book•
29 Nov 1997
TL;DR: The foundations of special relativity relativistic kinematics, electrodynamics in media, and the test theories of the special relativity this article have been discussed in detail in this article.
Abstract: The foundations of special relativity relativistic kinematics the test theories of special relativity relativistic mechanics electrodynamics in media the proca vector field test of constancy of velocity of light tests of time dilation electromagnetism tests tests of relativistic mechanics upper bounds on photon mass tests of Thomas precession appendix - Minkowvski space-time, four dimension formulation.
133 citations
TL;DR: In this paper, it was shown that doubly special relativity (DSR) is obtained by considering the nonlinear four-momenta basis of classical Poincare algebra and does not lead to noncommutative space-time.
Abstract: We argue that the so-called doubly special relativity (DSR), recently proposed by Amelino-Camelia et al.1,2 with deformed boost transformations identical with the formulae for κ-deformed kinematics in bicrossproduct basis is classical special relativity in nonlinear disguise. The choice of symmetric composition law for deformed four-momenta as advocated in Refs. 1 and 2 implies that DSR is obtained by considering the nonlinear four-momenta basis of classical Poincare algebra and it does not lead to noncommutative space–time. We also show how to construct two large classes of doubly special relativity theories — generalizing the choice in Refs. 1 and 2 and the one presented by Magueijo and Smolin.3 The older version of deformed relativistic kinematics, differing essentially from classical theory in the coalgebra sector and leading to noncommutative κ-deformed Minkowski space is provided by quantum κ-deformation of Poincare symmetries.
130 citations