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Nersisyan, Henrik; Akrami, Yashar; Amendola, Luca; Koivisto, Tomi S.; Rubio, Javier; Solomon, Adam R.
Physical review. D, 02/2017, Letnik: 95, Številka: 4Journal Article
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.
