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Title: Stress-energy connection: Degravitating the vacuum energy
Authors: Demir, Durmuş Ali
Keywords: Cosmological constant
Gravitational constant
Stress-energy connection
Issue Date: 2013
Publisher: World Scientific Publishing Co. Pte Ltd
Abstract: This talk summarizes recent studies on the gravitational properties of vacuum energy in a non-Riemannian geometry formed by the stress-energy tensor of vacuum, matter and radiation. Postulating that the gravitational effects of matter and radiation can be formulated by an appropriate modification of the spacetime connection, we obtain varied geometro-dynamical equations which properly comprise the usual gravitational field equations with, however, Planck-suppressed, non-local, higher-dimensional additional terms. The prime novelty brought about by the formalism is that, the vacuum energy does act not as the cosmological constant but as the source of the gravitational constant. The formalism thus deafens the cosmological constant problem by channeling vacuum energy to gravitational constant. Nevertheless, quantum gravitational effects, if any, restore the problem via the graviton and graviton-matter loops, and the mechanism proposed here falls short of taming such contributions to cosmological constant.
Description: 13th Regional Conference on Mathematical Physics; Antalya; Turkey; 27 October 2010 through 31 October 2010
ISBN: 978-981441752-5
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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