Reexamination of inflation in noncommutative space-time after Planck results

Дата и время публикации : 2013-04-16T08:23:49Z

Авторы публикации и институты :
Nan Li
Xin Zhang

Ссылка на журнал-издание: Phys. Rev. D 88, 023508 (2013)
Коментарии к cтатье: 8 pages, 4 figures; version published in Physical Review D
Первичная категория: astro-ph.CO

Все категории : astro-ph.CO, gr-qc, hep-th

Краткий обзор статьи: An inflationary model in the framework of noncommutative space-time may generate a nontrivial running of the scalar spectral index, but usually induces a large tensor-to-scalar ratio simultaneously. With the latest observational data from the Planck mission, we reexamine the inflationary scenarios in a noncommutative space-time. We find that either the running of the spectral index is tiny compared with the recent observational result, or the tensor-to-scalar ratio is too large to allow a sufficient number of $e$-folds. As examples, we show that the chaotic and power-law inflation models with the noncommutative effects are not favored by the current Planck data.

Category: Physics