TY - GEN
T1 - Connecting the non-singular origin of the universe, the vacuum structure and the cosmological constant problem
AU - Guendelman, Eduardo I.
AU - Labraña, Pedro
N1 - Funding Information:
P. L. has been partially supported by FONDECYT grant N0 11090410, Mecesup UBB0704 and Universidad del Bío-Bío through grant DIUBB 121407 GI/VC.
Funding Information:
P. L. has been partially supported by FONDECYT grant N011090410, Mecesup UBB0704 and Universidad del Bío-Bío through grant DIUBB 121407 GI/VC.
Publisher Copyright:
© 2015, World Scientific. All rights reserved.
PY - 2015/1/1
Y1 - 2015/1/1
N2 - We consider a non singular origin for the Universe starting from an Einstein static Universe in the framework of a theory which uses two volume elements √−gd4x and Φd4 x, where Φ is a metric independent density, also curvature, curvature square terms, first order formalism and for scale invariance a dilaton field φ are considered in the action. In the Einstein frame we also add a cosmological term that parametrizes the zero point fluctuations. The resulting effective potential for the dilaton contains two flat regions, for φ →∞relevant for the non singular origin of the Universe and φ →−∞, describing our present Universe. Surprisingly, avoidance of singularities and stability as φ →∞ imply a positive but small vacuum energy as φ →−∞. Zero vacuum energy density for the present universe is the ”threshold” for universe creation.
AB - We consider a non singular origin for the Universe starting from an Einstein static Universe in the framework of a theory which uses two volume elements √−gd4x and Φd4 x, where Φ is a metric independent density, also curvature, curvature square terms, first order formalism and for scale invariance a dilaton field φ are considered in the action. In the Einstein frame we also add a cosmological term that parametrizes the zero point fluctuations. The resulting effective potential for the dilaton contains two flat regions, for φ →∞relevant for the non singular origin of the Universe and φ →−∞, describing our present Universe. Surprisingly, avoidance of singularities and stability as φ →∞ imply a positive but small vacuum energy as φ →−∞. Zero vacuum energy density for the present universe is the ”threshold” for universe creation.
UR - http://www.scopus.com/inward/record.url?scp=85045375040&partnerID=8YFLogxK
U2 - 10.1142/9789814623995_0238
DO - 10.1142/9789814623995_0238
M3 - Conference contribution
AN - SCOPUS:85045375040
SN - 9789814612142
T3 - The 13th Marcel Grossmann Meeting: On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories - Proceedings of the MG13 Meeting on General Relativity, 2012
SP - 1608
EP - 1610
BT - On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories
A2 - Rosquist, Kjell
A2 - Jantzen, Robert T.
A2 - Ruffini, Remo
A2 - Ruffini, Remo
PB - World Scientific
T2 - 13th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Gravitation, and Relativistic Field Theories, MG13 2012
Y2 - 1 July 2015 through 7 July 2015
ER -