Cosmological constant from gauge fields on extra dimensions

Journal Article · Mon Nov 19 23:00:00 EST 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2823814· OSTI ID:21039357

Ho, C -L; Cho, H -T ^[1]; Ng, K -W ^[2]

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1. Department of Physics, Tamkang University, Tamsui 25137, Taiwan (China)
2. Institute of Physics, Academia Sinica, Nankang, Taipei, Taiwan 115 (China)

We present a new model of dark energy which could explain the observed accelerated expansion of our Universe. We show that a five-dimensional Einstein-Yang-Mills theory defined in a flat Friedmann-Robertson-Walker universe compactified on a circle possesses degenerate vacua in four dimensions. The present Universe could be trapped in one of these degenerate vacua. With the natural requirement that the size of the extra dimension could be of the GUT scale or smaller, the energy density difference between the degenerate vacua and the true ground state can provide us with just the right amount of dark energy to account for the observed expansion rate of our Universe.

• OSTI ID: 21039357
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 957; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COMPACTIFICATION
COSMOLOGICAL CONSTANT
COSMOLOGY
ENERGY DENSITY
GROUND STATES
INFLATIONARY UNIVERSE
NONLUMINOUS MATTER
SYMMETRY BREAKING
TRAPPING
UNIVERSE
VACUUM STATES
YANG-MILLS THEORY