Gauge invariance and non-Gaussianity in Inflation

Дата и время публикации : 2011-04-02T06:20:46Z

Авторы публикации и институты :
Gerasimos Rigopoulos

Ссылка на журнал-издание: Phys.Rev.D84:021301,2011
Коментарии к cтатье: 4 pages, no figures; v2: 5 pages, no figures, substantial text added, results unchanged, published in PRD Rapid Communications
Первичная категория: astro-ph.CO

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

Краткий обзор статьи: We clarify the role of gauge invariance for the computation of quantum non-Gaussian correlators in inflation. A gauge invariant generating functional for n-point functions is given and the special status of the spatially flat gauge is pointed out. We also comment on the relation between gauge transformations, field redefinitions, the choice of $t={rm const}$ hypersurfaces and the use of boundary terms in computations of non-Gaussianity.

Category: Physics