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New variational principles as alternatives to the Palatini method

Tomi Koivisto
Phys. Rev. D 83, 101501(R) – Published 24 May 2011

Abstract

A variational principle was recently suggested by Goenner, where an independent metric generates the spacetime connection. It is pointed out here that the resulting theory is equivalent to the usual Palatini theory. However, a bimetric reformulation of the variational principle leads to theories which are physically distinct from both the metric and the metric-affine ones, even for the Einstein-Hilbert action. They are obtained at a decoupling limit of C-theories, which contain also other viable generalizations of the Palatini theories.

  • Received 17 March 2011

DOI:https://doi.org/10.1103/PhysRevD.83.101501

© 2011 American Physical Society

Authors & Affiliations

Tomi Koivisto*

  • Institute for Theoretical Physics and Spinoza Institute, Leuvenlaan 4, 3584 CE Utrecht, The Netherlands

  • *T.S.Koivisto@uu.nl

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Issue

Vol. 83, Iss. 10 — 15 May 2011

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