Time evolution of T_{μν} and the cosmological constant problem

Abstract

We study the cosmic time evolution of an effective quantum field theory energy-momentum tensor T_{μν} and show that, as a consequence of the effective nature of the theory, the structure of T_{μν} 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.

11 Pages, revised version

References in corpus (4)

• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• Categorizing Different Approaches to the Cosmological Constant Problem
• Considerations Concerning the Contributions of Fundamental Particles to the Vacuum Energy Density

Cited by in corpus (9)

• Hubble expansion and structure formation in the "running FLRW model" of the cosmic evolution
• Cosmologies with a time dependent vacuum
• Evidence for the Fifth Element Astrophysical status of Dark Energy
• An Estimate of Λin Resummed Quantum Gravity in the Context of Asymptotic Safety
• Dilution of zero point energies in the cosmological expansion
• Shadows of trans-planckian physics on cosmology and the role of the zero-point energy density
• Einstein-Heisenberg Consistency Condition Interplay with Cosmological Constant Prediction in Resummed Quantum Gravity
• Prediction for the Cosmological Constant and Constraints on Susy GUTS in Resummed Quantum Gravity
• Prediction for the Cosmological Constant in Resummed Quantum Gravity and Constraints on SUSY GUT's