Transient quintessence from group manifold reductions or how all roads lead to Rome
We investigate the accelerating phases of cosmologies supported by a metric, scalars and a single exponential scalar potential. The different solutions can be represented by trajectories on a sphere and we find that quintessence happens within the 'arctic circle' of the sphere. Furthermore...
Published in: | Classical and Quantum Gravity |
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Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2004
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Subjects: | |
Online Access: | https://hdl.handle.net/11370/132f0f0b-8e67-4d41-865f-544958f97fcf https://research.rug.nl/en/publications/132f0f0b-8e67-4d41-865f-544958f97fcf https://doi.org/10.1088/0264-9381/21/8/003 https://pure.rug.nl/ws/files/6679623/2004ClassQuantGravBergshoeff1.pdf |
Summary: | We investigate the accelerating phases of cosmologies supported by a metric, scalars and a single exponential scalar potential. The different solutions can be represented by trajectories on a sphere and we find that quintessence happens within the 'arctic circle' of the sphere. Furthermore, we obtain multi-exponential potentials from 3D group manifold reductions of gravity, implying that such potentials can be embedded in gauged supergravities with an M-theory origin. We relate the double exponential case to flux compactifications on maximally symmetric spaces and S-branes. In the triple exponential case our analysis suggests the existence of two exotic S(D - 3)-branes in D dimensions. |
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