Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Non-Gaussianity from instant and tachyonic preheating
AU - Enqvist, Kari
AU - Jokinen, Asko
AU - Mazumdar, Anupam
AU - Multamaki, Tuomas
AU - Vaihkonen, Antti
N1 - 12 pages, 1 figure, additional discussion, improved constraint on the scale of tachyonic preheating
PY - 2005/3/31
Y1 - 2005/3/31
N2 - We study non-Gaussianity in two distinct models of preheating: instant and tachyonic. In instant preheating non-Gaussianity is sourced by the local terms generated through the coupled perturbations of the two scalar fields. We find that the non-Gaussianity parameter is given by $f_{NL}^{\phi}\sim 2g
AB - We study non-Gaussianity in two distinct models of preheating: instant and tachyonic. In instant preheating non-Gaussianity is sourced by the local terms generated through the coupled perturbations of the two scalar fields. We find that the non-Gaussianity parameter is given by $f_{NL}^{\phi}\sim 2g
KW - cosmological perturbation theory
KW - physics of the early universe
U2 - 10.1088/1475-7516/2005/03/010
DO - 10.1088/1475-7516/2005/03/010
M3 - Journal article
VL - 2005
JO - Journal of Cosmology and Astroparticle Physics
JF - Journal of Cosmology and Astroparticle Physics
SN - 1475-7516
IS - 3
ER -