Quantum contributions to cosmological correlations
Abstract
The “inin” formalism is reviewed and extended, and applied to the calculation of higherorder Gaussian and nonGaussian correlations in cosmology. Previous calculations of these correlations amounted to the evaluation of tree graphs in the inin formalism; here we also consider loop graphs. It turns out that for some though not all theories, the contributions of loop graphs as well as tree graphs depend only on the behavior of the inflaton potential near the time of horizon exit. A sample oneloop calculation is presented.
 Publication:

Physical Review D
 Pub Date:
 August 2005
 DOI:
 10.1103/PhysRevD.72.043514
 arXiv:
 arXiv:hepth/0506236
 Bibcode:
 2005PhRvD..72d3514W
 Keywords:

 98.80.k;
 04.60.m;
 04.62.+v;
 98.80.Jk;
 Cosmology;
 Quantum gravity;
 Quantum field theory in curved spacetime;
 Mathematical and relativistic aspects of cosmology;
 Astrophysics;
 General Relativity and Quantum Cosmology;
 High Energy Physics  Theory
 EPrint:
 39 pages