Cosmological Constant Problems and Renormalization Group

Abstract

The Cosmological Constant Problem emerges when Quantum Field Theory is applied to the gravitational theory, due to the enormous magnitude of the induced energy of the vacuum. The unique known solution of this problem involves an extremely precise fine-tuning of the vacuum counterpart. We review a few of the existing approaches to this problem based on the account of the quantum (loop) effects and pay special attention to the ones involving the renormalization group.

12 pages, LaTeX, based on the on the talk at IRGAC-2006 (Barcelona, July 11-15, 2006), misprints corrected, comment on anthropic approach modified, some references added, accepted in Journal of Physics A

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Cited by in corpus (26)

• On the possible running of the cosmological "constant"
• Dark energy: a quantum fossil from the inflationary Universe?
• Cosmologies with a time dependent vacuum
• Dark energy perturbations and cosmic coincidence
• Dynamics and cosmological evolution in Λ-varying cosmology
• Excitation of Photons by Inflationary Gravitons
• Cosmic perturbations with running G and Lambda
• The spherical collapse model in time varying vacuum cosmologies
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• Holographic dark energy from the laws of thermodynamics with Rényi entropy
• Summing Inflationary Logarithms in Nonlinear Sigma Models
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• Induced gravity from gauge theories
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• Cosmological bootstrap
• Installing of cosmological constant
• Cosmology from a gauge induced gravity