Phys. Rev. Lett. 90, 231302 (2003) [4 pages]Conformal Fixed Point, Cosmological Constant, and QuintessenceReceived 22 October 2002; published 13 June 2003 We connect a possible solution for the “cosmological constant problem” to the existence of a (postulated) conformal fixed point in a fundamental theory. The resulting cosmology leads to quintessence, where the present acceleration of the expansion of the universe is linked to a crossover in the flow of coupling constants. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.231302
DOI:
10.1103/PhysRevLett.90.231302
PACS:
98.80.Cq, 95.35.+d
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