Primordial non-Gaussianities in single field inflationary models with non-trivial initial states

Дата и время публикации : 2013-10-16T19:14:55Z

Авторы публикации и институты :
Sina Bahrami
Éanna É. Flanagan

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Первичная категория: astro-ph.CO

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

Краткий обзор статьи: We compute the non-Gaussianities that arise in single field, slow roll inflationary models arising from arbitrary homogeneous initial states, as well as subleading contributions to the power spectrum. Non Bunch-Davies vacuum initial states can arise if the transition to the single field, slow roll inflation phase occurs only shortly before observable modes left the horizon. They can also arise from new physics at high energies that has been integrated out. Our general result for the bispectrum exhibits several features that were previously seen in special cases.

Category: Physics