The Zeta-Zeta Correlator Is Time Dependent

Details The Zeta-Zeta Correlator Is Time Dependent The Zeta-Zeta Correlator Is Time Dependent

2010-06-21

arxiv.org/abs/1006.3999v1

Phys.Lett.B694:101-107,2010

Astronomy and Astrophysics

Astrophysics

Cosmology and Extragalactic Astrophysics

7 pages, 2 figures, uses Revtex4

Scientific paper

10.1016/j.physletb.2010.09.050

We comment on the recent arguments by Senatore and Zaldarriaga that loop corrections to the zeta-zeta correlator cannot grow with time after first horizon crossing. We first emphasize the need to search for such secular dependence in corrections whose in-out matrix elements are infrared singular on an infinite spatial manifold. Then we give examples of such time dependence from pure quantum gravity and from scalar potential models. Finally, we point out that this time dependence arises from inflationary particle production and is therefore unlikely to endanger the preservation of super-horizon correlations as a record of inflation.

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