Can we live in a self-tuning universe?

Sean M. Carroll and Laura Mersini
Phys. Rev. D 64, 124008 – Published 9 November 2001
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Abstract

The self-tuning brane scenario is an attempt to solve the cosmological constant problem in the context of extra dimensions. Rather than making the vacuum energy small, this approach proceeds by removing the gravitational effect of vacuum energy on the expansion of the universe. Such behavior is only possible through changing the Friedmann equation of conventional cosmology, and we discuss difficulties in obtaining cosmological evolution compatible with observation in this context. Specific models considered include a bulk scalar field coupling to the brane via a conformal transformation of the brane metric, and via a rescaling of the brane volume element.

  • Received 3 May 2001

DOI:https://doi.org/10.1103/PhysRevD.64.124008

©2001 American Physical Society

Authors & Affiliations

Sean M. Carroll*

  • Enrico Fermi Institute and Department of Physics, University of Chicago, 5640 S. Ellis Avenue, Chicago, Illinois 60637

Laura Mersini

  • Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126 Pisa, Italy

  • *Email address: carroll@theory.uchicago.edu
  • Email address: mersini@cibs.sns.it

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Issue

Vol. 64, Iss. 12 — 15 December 2001

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