Phys. Rev. D 64, 123525 (2001) [4 pages]Brane quintessenceReceived 14 December 2000; published 28 November 2001 We propose a new quintessence scenario in brane cosmology, assuming that a quintessence field Q is confined in our three-dimensional brane world. With a potential V(Q)=μα+4Q-α (α>~2), we find that the density parameter of the scalar field decreases as ΩQ∼a-4(α-2)/(α+2) in the epoch of quadratic energy density dominance, if α<~6. This attractor solution is followed by the usual tracking quintessence scenario after a conventional Friedmann universe is recovered. With an equipartition of initial energy density, we find a natural and successful quintessence model for α≳4. © 2001 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevD.64.123525
DOI:
10.1103/PhysRevD.64.123525
PACS:
98.80.Cq, 04.50.+h, 11.10.Kk
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