Correspondence between loop-inspired and braneworld cosmology

Edmund J. Copeland*, James E. Lidsey, Shuntaro Mizuno


研究成果: Article査読

26 被引用数 (Scopus)


Braneworld scenarios are motivated by string/M-theory and can be characterized by the way in which they modify the conventional Friedmann equations of Einstein gravity. An alternative approach to quantum gravity, however, is the loop quantum cosmology program. In the semiclassical limit, the cosmic dynamics in this scenario can also be described by a set of modified Friedmann equations. We demonstrate that a dynamical correspondence can be established between these two paradigms at the level of the effective field equations. This allows qualitatively similar features between the two approaches to be compared and contrasted as well as providing a framework for viewing braneworld scenarios in terms of constrained Hamiltonian systems. As concrete examples of this correspondence, we illustrate the relationships between different cosmological backgrounds representing scaling solutions.

ジャーナルPhysical Review D - Particles, Fields, Gravitation and Cosmology
出版ステータスPublished - 2006

ASJC Scopus subject areas

  • 物理学および天文学(全般)
  • 核物理学および高エネルギー物理学
  • 数理物理学


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