Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/5953
Title: Eddington's gravity in immersed spacetime
Authors: Azri, Hemza
Keywords: Cosmological constant
Eddingtons gravity
Hypercomplex structure
Immersed spacetime
Vacuum energy
Issue Date: 19-Mar-2015
Publisher: IOP Publishing Ltd.
Source: Azri, H. (2015). Eddington's gravity in immersed spacetime. Classical and Quantum Gravity, 32(6). doi:10.1088/0264-9381/32/6/065009
Abstract: We formulate Eddington's affine gravity in a spacetime that is immersed in a larger eight-dimensional space endowed with a hypercomplex structure. The dynamical equation of the first immersed Ricci-type tensor leads to gravitational field equations which include matter. We also study the dynamical effects of the second Ricci-type tensor when added to the Lagrangian density. A simple Lagrangian density constructed from a combination of the standard Ricci tensor and a new tensor field that appears due to the immersion, leads to gravitational equations in which the vacuum energy gravitates with a different cosmological strength as in Demir (2014 Phys. Rev. D 90 064017), rather than with Newton's constant. As a result, the tiny observed curvature is reproduced due to large hierarchies rather than fine tuning.
URI: https://doi.org/10.1088/0264-9381/32/6/065009
http://hdl.handle.net/11147/5953
ISSN: 0264-9381
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Files in This Item:
File Description SizeFormat 
5953.pdfMakale146.37 kBAdobe PDFThumbnail
View/Open
Show full item record



CORE Recommender

SCOPUSTM   
Citations

10
checked on Feb 16, 2024

WEB OF SCIENCETM
Citations

10
checked on Feb 26, 2024

Page view(s)

152
checked on Feb 26, 2024

Download(s)

266
checked on Feb 26, 2024

Google ScholarTM

Check




Altmetric


Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.