Devaluation: a dynamical mechanism for a naturally small cosmological constant
Devaluation: a dynamical mechanism for a naturally small cosmological constant
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DOI：
10.1016/j.physletb.2006.01.002
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发表时间：
2005-10
影响因子：
4.4
通讯作者：
K. Freese;James T. Liu;D. Spolyar
中科院分区：
文献类型：
--
作者：
K. Freese;James T. Liu;D. Spolyar
We propose a natural solution to the cosmological constant problem consistent with the standard cosmology and successful over a broad range of energies. This solution is based on the existence of a new field, the devaluton, with its potential modeled on a tilted cosine. After inflation, the universe reheats and populates the devaluton's many minima. As the universe cools, domain walls form between different regions. The domain wall network then evolves and sweeps away regions of higher vacuum energy in favor of lower energy ones. Gravitation itself provides a cutoff at a minimum vacuum energy, thus leaving the universe with a small cosmological constant comparable in magnitude to the present day dark energy density.
