Reconstruction procedure in nonlocal cosmological modelsстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 19 июля 2013 г.
Аннотация:A nonlocal gravity model is considered which does not assume the existence of a new dimensional parameter in the action and includes a function f (□ −1 R ), with □ the d’Alembertian operator. Using a reconstruction procedure for the local scalar-tensor formulation of this model, a function f is obtained for which the model exhibits power-law solutions with the Hubble parameter H = n / t , for any value of the constant n . For generic n —namely except for a few special values which are characterized and also specifically studied—the corresponding function f is a sum of exponential functions. Corresponding power-law solutions are found explicitly. Also the case is solved in all detail of a function f such that the model contains both de Sitter and power-law solutions.