Isochronous spacetimes and cosmologies

7th International Workshop DICE2014 Spacetime – Matter – Quantum Mechanics

物理学;力学

Briscese, Fabio^1,2 ; Calogero, Francesco^3,4

Departamento de Física, CCEN, Universidade Federal da Paraíba, João Pessoa, PB

58051-970, Brazil^1

Istituto Nazionale di Alta Matematica Francesco Severi, Gruppo Nazionale di Fisica Matematica, Città Universitaria, p. Aldo Moro 5, Rome

I-00185, Italy^2

Physics Department, University of Rome la Sapienza, p. Aldo Moro, Rome

I-00185, Italy^3

Istituto Nazionale di Fisica Nucleare, Sezione di Roma, Italy^4

关键词: Big Bang;    Cosmological modeling;    Fixed period;    General Relativity;    Global time;    Original model;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/626/1/012004/pdf
DOI  :  10.1088/1742-6596/626/1/012004

学科分类：力学，机械学

来源: IOP

【 摘 要 】

It is shown, in the context of general relativity, how to modify any cosmological model so that its local (in time) properties are unchanged, but its global time evolution is isochronous, i. e. completely periodic with a fixed period independent of the initial data. In this manner the Big Bang singularity might be avoided, even if this singularity is featured by the original model.