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Instabilities in tensorial nonlocal gravity
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Instabilities in tensorial nonlocal gravity
classification
gr-qc
astro-ph.COhep-th
keywords
nonlocalcosmologicaltensorialassumingcasescontainingcontributedensity
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We discuss the cosmological implications of nonlocal modifications of general relativity containing tensorial structures. Assuming the presence of standard radiation- and matter-dominated eras, we show that, except in very particular cases, the nonlocal terms contribute a rapidly growing energy density. These models therefore generically do not have a stable cosmological evolution.
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