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arxiv: 1711.07486 · v2 · submitted 2017-11-20 · 🌀 gr-qc · hep-th

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Quantum equivalence of f(R) gravity and scalar-tensor theories

Michael S. Ruf , Christian F. Steinwachs
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classification 🌀 gr-qc hep-th
keywords equivalencequantumgravityscalar-tensorbrokenclassicalcomparecorrections
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We investigate whether the classical equivalence of $f(R)$ gravity and its formulation as scalar-tensor theory still holds at the quantum level. We explicitly compare the corresponding one-loop divergences and find that the equivalence is broken by off-shell quantum corrections, but recovered on-shell.

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  1. Frame invariant diffusive formulation of scalar-tensor gravity

    gr-qc 2026-04 unverdicted novelty 7.0

    Scalar-tensor gravity admits a frame-invariant perfect-fluid description with zero temperature, so that general relativity corresponds to diffusive equilibrium for both minimal and nonminimal theories.