Kaluza-Klein reduction of a quadratic curvature model

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Baskal S., Kuyrukcu H.

GENERAL RELATIVITY AND GRAVITATION, vol.45, no.2, pp.359-371, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 45 Issue: 2
  • Publication Date: 2013
  • Doi Number: 10.1007/s10714-012-1476-7
  • Journal Name: GENERAL RELATIVITY AND GRAVITATION
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.359-371
  • Keywords: Kaluza-Klein, Dimensional reduction, Field equations, Energy-Stress tensors, GRAVITATIONAL-FIELD EQUATIONS, YANG-MILLS FORMULATION, GRAVITY, RELATIVITY, DYNAMICS
  • Middle East Technical University Affiliated: Yes

Abstract

Palatini variational principle is implemented on a five dimensional quadratic curvature gravity model, rendering two sets of equations, which can be interpreted as the field equations and the stress-energy tensor. Unification of gravity with electromagnetism and the scalar dilaton field is achieved through the Kaluza-Klein dimensional reduction mechanism. The reduced curvature invariant, field equations and the stress-energy tensor are obtained in the actual four dimensional spacetime. The structure of the interactions among the constituent fields is exhibited in detail. It is shown that the Lorentz force density naturally emerges from the reduced field equations and the equations of the standard Kaluza-Klein theory are demonstrated to be intrinsically contained in this model.