An Approach to the Cosmological Constant Problem(s)
arXiv:hep-ph/0408169 · doi:10.1016/j.physletb.2004.12.078
Abstract
We propose an approach to explaining why naive large quantum fluctuations are not the right estimate for the cosmological constant. We argue that the universe is in a superposition of many vacua, in such a way that the resulting fluctuations are suppressed by level repulsion to a very small value. The approach combines several aspects of string theory and the early history of the universe, and is only valid if several assumptions hold true. The approach may also explain why the effective cosmological constant reamins small as the universe evolves though several phase transitions. It provides a non-anthropic mechansim leading to a small, non-zero cosmological constant.
Talk given at Rencontres de Moriond, 2004 by G.L. Kane
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Cited by in corpus (10)
- Dynamics of dark energy
- Life at the Interface of Particle Physics and String Theory
- Dark Energy in Practice
- Dark energy: investigation and modeling
- Cosmological Moduli Dynamics
- The Boundedness of Euclidean Gravity and the Wavefunction of the Universe
- A Note on the Quantum Creation of Universes
- A Dark Energy Model in Lyra Manifold
- A Renormalization Group Approach to the Cosmological Constant Problem
- Accelerating universe emergent from the landscape