We study the cosmic time evolution of an effective quantum field theory energy-momentum tensor Tμν and show that, as a consequence of the effective nature of the theory, Tμν is such that the vacuum energy decreases with time.We find that the zero point energy at present time is washed out by the cosmological evolution. The implications of this finding for the cosmological constant problem are investigated.
|Titolo:||Time evolution of Tμν and the cosmological constant problem|
|Autori interni:||BRANCHINA, Vincenzo|
|Data di pubblicazione:||2010|
|Rivista:||GENERAL RELATIVITY AND GRAVITATION|
|Appare nelle tipologie:||1.1 Articolo in rivista|