Stability analysis and future singularity of the $m^{2}R{\square }^{-2}R$ model of non-local gravity

Yves Dirian, Ermis Mitsou

We analyse the classical stability of the model proposed by Maggiore and Mancarella, where gravity is modified by a term $\sim m^{2}R{\square }^{-2}R$ to produce the late-time accelerat…