Advanced search
Start date
Betweenand

Bouncing cosmologies: the ekpyrotic universe

Grant number: 13/03798-3
Support Opportunities:Scholarships in Brazil - Post-Doctoral
Start date: June 01, 2013
End date: May 31, 2017
Field of knowledge:Physical Sciences and Mathematics - Physics - General Physics
Principal Investigator:Alberto Vazquez Saa
Grantee:Juliano César Silva Neves
Host Institution: Instituto de Matemática, Estatística e Computação Científica (IMECC). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
Associated research grant:13/09357-9 - Physics and geometry of spacetime, AP.TEM

Abstract

Bouncing cosmologies are a possible solution for the initial singularity problem. The latter is an open issue in the standard inflationary cosmology. Among the several scenarios with a bounce, we intend to study models with a non-minimally coupled scalar field, models of modified gravity f(R) and, mainly, the ekpyrotic universe. The ekpyrotic cosmology has a slowly contracting phase which allow to solve two important problems solved by the inflation: the flatness and homogeneity. Moreover, the new ekpyrotic cosmology has a smooth transition - the bounce - between the contracting and expansion phases avoiding the initial singularity. Another important characteristic in this cosmology beyond the standard cosmology is to provide adiabatic primordial fluctuations in accordance with the cosmic microwave background radiation and a relevant non-Gaussianity in second order perturbations which may be detected in the Planck telescope. An extension of the ekpyrotic model is the cyclic cosmology: a daring attempt to know all the universe history. This project proposes to investigate these bouncing cosmologies, its problems and forecasts. (AU)

News published in Agência FAPESP Newsletter about the scholarship:
More itemsLess items
Articles published in other media outlets ( ):
More itemsLess items
VEICULO: TITULO (DATA)
VEICULO: TITULO (DATA)

Scientific publications (8)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
NEVES, J. C. S.. Note on regular black holes in a brane world. Physical Review D, v. 92, n. 8, . (13/03798-3)
JULIANO NEVES. Relatividade bem comportada: buracos negros regulares. Revista Brasileira de Ensino de Física, v. 39, n. 3, . (13/03798-3)
NEVES, J. C. S.. Einstein contra Aristotle: The sound from the heavens. PHYSICS ESSAYS, v. 30, n. 3, p. 279-280, . (13/03798-3, 13/09357-9)
NEVES, J. C. S.. Deforming regular black holes. International Journal of Modern Physics A, v. 32, n. 18, . (13/03798-3)
NEVES, J. C. S.. Bouncing cosmology inspired by regular black holes. GENERAL RELATIVITY AND GRAVITATION, v. 49, n. 9, . (13/03798-3)
NEVES, J. C. S.. Are black holes in an ekpyrotic phase possible?. ASTROPHYSICS AND SPACE SCIENCE, v. 361, n. 9, . (13/03798-3)
NEVES, J. C. S.; SAA, ALBERTO. Regular rotating black holes and the weak energy condition. Physics Letters B, v. 734, p. 44-48, . (13/03798-3)
NEVES, J. C. S.. Note on regular black holes in a brane world. Physical Review D, v. 92, n. 8, p. 5-pg., . (13/03798-3)