Phys. Rev. D 67, 043519 (2003) [7 pages]Domain walls as dark energy |
PRL Celebrates 50 Years
This Week's Milestone Letters are from 1984: |
Alexander Friedland
School of Natural Sciences, Institute for Advanced Study, Einstein Drive, Princeton, New Jersey 08540
Hitoshi Murayama
Department of Physics, University of California, Berkeley, California 94720
Theory Group, Lawrence Berkeley National Laboratory, Berkeley, California 94720
Maxim Perelstein
Theory Group, Lawrence Berkeley National Laboratory, Berkeley, California 94720
Received 7 June 2002; published 28 February 2003
The possibility that the energy density of the Universe is dominated by a network of low-tension domain walls provides an alternative to the commonly discussed cosmological constant and scalar-field quintessence models of dark energy. We quantify the lower bound on the number density of the domain walls that follows from the observed near isotropy of the cosmic microwave background radiation. This bound can be satisfied by a strongly frustrated domain wall network. No fine tuning of the parameters of the underlying field theory model is required. We briefly outline the observational consequences of this model.
©2003 The American Physical Society
URL: http://link.aps.org/abstract/PRD/v67/e043519
DOI: 10.1103/PhysRevD.67.043519
PACS: 98.80.Cq, 11.27.+d
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