EPJ Web of Conferences
Volume 58, 2013TM 2012 – The Time Machine Factory [unspeakable, speakable] on Time Travel in Turin
|Number of page(s)||12|
|Section||The Spacetime Machine: Traveling from Micro to Macro Events|
|Published online||05 September 2013|
Extended Theories of Gravitation
Structure of Spacetime and Fundamental Principles of Physics, following Ehlers-Pirani-Schild Framework
1 Dipartimento di Matematica, University of Torino, Italy
2 INFN – Sez. Torino, Iniziativa Specifica Na12
Published online: 5 September 2013
Extended theories of gravitation are naturally singled out by an analysis inspired by the Ehelers-Pirani-Schild framework. In this framework the structure of spacetime is described by a Weyl geometry which is enforced by dynamics. Standard General Relativity is just one possible theory within the class of extended theories of gravitation. Also all Palatini f(R) theories are shown to be extended theories of gravitation. This more general setting allows a more general interpretation scheme and more general possible couplings between gravity and matter. The definitions and constructions of extended theories will be reviewed. A general interpretation scheme will be considered for extended theories and some examples will be considered.
© Owned by the authors, published by EDP Sciences, 2013
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