Generalized unimodular gravity in Friedmann and Kantowski-Sachs universes
A. Yu. Kamenshchik+*, A. Tronconi+, G. Venturi+
+Dipartimento di Fisica e Astronomia, Universitàdi Bologna and Istituto Nazionale di Fisica Nucleare,
via Irnerio 46, 40126 Bologna, Italy
*L. D. Landau Institute for Theoretical Physics, Russian Academy of Sciences, 117940 Moscow, Russia
Abstract
We illustrate the recently proposed generalized unimodular gravity using simple
examples of the Friedmann, Kantowski-Sachs and Schwarzschild geometries and show
that it can be further generalized and reveal some unexpected and interesting
effects.