Breakdown of the initial value formulation of scalar-tensor gravity and its physical meaning

Details Breakdown of the initial value formulation of scalar-tensor gravity and its physical meaning Breakdown of the initial value formulation of scalar-tensor gravity and its physical meaning

2008-08-14

arxiv.org/abs/0808.1943v1

Phys.Rev.D78:064017,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

14 pages, LaTex, to appear in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.78.064017

We revisit singularities of two distinct kinds in the Cauchy problem of general scalar-tensor theories of gravity (previously discussed in the literature), and of metric and Palatini f(R) gravity, in both their Jordan and Einstein frame representations. Examples and toy models are used to shed light onto the problem and it is shown that, contrary to common lore, the two conformal frames are equivalent with respect to the initial value problem.

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