Squeezed tensor non-Gaussianity in non-attractor inflation
Squeezed tensor non-Gaussianity in non-attractor inflation
复制标题
非吸引子膨胀中的压缩张量非高斯性
DOI:
10.1088/1475-7516/2019/09/036
复制
发表时间:
2019
影响因子:
6.4
通讯作者:
Özsoy O
中科院分区:
文献类型:
--
作者:
Özsoy O
We investigate primordial tensor non-Gaussianity in single field inflation, during a phase of non-attractor evolution when the spectrum of primordial tensor modes can be enhanced to a level detectable at interferometer scales. Making use of a tensor duality we introduced in [1], we analytically compute the full bispectrum of primordial tensor fluctuations during the non-attractor era. During this epoch the shape of the tensor bispectrum is enhanced in the squeezed limit, its amplitude can be amplified with respect to slow-roll models, and tensor non-Gaussianity can exhibit a scale dependence distinctive of our set-up. We prove that our results do not depend on the frame used for the calculations. Squeezed tensor non-Gaussianity induces a characteristic quadrupolar anisotropy on the power spectrum of the stochastic background of primordial tensor perturbations. As a step to make contact with gravitational wave experiments, we discuss the response function of a ground based Michelson interferometer to a gravitational wave background with such a feature.
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DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
D. Carney;W. Fischler;E. Kovetz;D. Lorshbough;S. Paban
通讯作者:
S. Paban
影响因子:
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作者:
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Tsutomu Kobayashi;Masahide Yamaguchi;J. Yokoyama
影响因子:
6.4
作者:
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通讯作者:
G. Tasinato
影响因子:
5
作者:
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通讯作者:
Pilo, Luigi
影响因子:
5
作者:
A. Ricciardone;G. Tasinato
通讯作者:
A. Ricciardone;G. Tasinato