Einstein equations with fluctuating volume


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We develop a simple model for a study of classical fields in the background of a fluctuating spacetime volume. It is applied for a formulation of the Einstein equations with a perfect-fluid source. We investigate the particular case of a Friedmann-Lemaître-Robertson-Walker cosmology and show that the resulting field equations can lead to solutions which avoid the initial Big Bang singularity. By interpreting the fluctuations as a result of the presence of quantum spacetime, we conclude that classical singularities can be avoided even within a semiclassical model that includes quantum effects in a very simple manner.

作者简介

Vladimir Dzhunushaliev

Physical-Technical Faculty; IETP

编辑信件的主要联系方式.
Email: v.dzhunushaliev@gmail.com
哈萨克斯坦, al-Farabi av. 71, Almaty, 050040; Almaty, 050040

Hernando Quevedo

Instituto de Ciencias Nucleares; Dipartimento di Fisica and ICRA

Email: v.dzhunushaliev@gmail.com
墨西哥, México, DF 04510; Piazzale Aldo Moro 5, Roma, I-00185

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