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Parametrizations in scalar-tensor theories of gravity and the limit of general relativity

We consider a general scalar-tensor theory of gravity and review briefly different forms it can be presented (different conformal frames and scalar field parametrizations). We investigate the conditions under which its field equations and the parametrized post-Newtonian parameters coincide with those of general relativity. We demonstrate that these so-called limits of general relativity are independent of the parametrization of the scalar field, although the transformation between scalar fields may be singular at the corresponding value of the scalar field. In particular, the limit of general relativity can equivalently be determined and investigated in the commonly used Jordan and Einstein frames.

preprint2015arXivOpen access
Laur JarvPiret KuuskMargus SaalOtt Vilson
gr-qc
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Open access4 authors1 topic
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Laur JarvPiret KuuskMargus SaalOtt Vilson

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