A note on viability of nonminimally coupled f(R) theory
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🌀 gr-qc
keywords
couplednonminimallynoteabsencebeenclarifiesconditionsconfirms
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Consistency conditions for nonminimally coupled $f(R)$ theories have been derived by requiring the absence of tachyons and instabilities in the scalar fluctuations. This note confirms these results and clarifies a subtlety regarding different definitions of sound speeds.
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