Anisotropic tensor power spectrum at interferometer scales induced by tensor squeezed non-Gaussianity
نویسندگان
چکیده
منابع مشابه
Anisotropic scalar-tensor cosmologies.
We examine homogeneous but anisotropic cosmologies in scalar-tensor gravity theories, including Brans-Dicke gravity. We present a method for deriving solutions for any isotropic perfect fluid with a barotropic equation of state (p ∝ ρ) in a spatially flat (Bianchi type I) cosmology. These models approach an isotropic, general relativistic solution as the expansion becomes dominated by the barot...
متن کاملAnisotropic fractional diffusion tensor imaging.
Traditional diffusion tensor imaging (DTI) maps brain structure by fitting a diffusion model to the magnitude of the electrical signal acquired in magnetic resonance imaging (MRI). Fractional DTI employs anomalous diffusion models to obtain a better fit to real MRI data, which can exhibit anomalous diffusion in both time and space. In this paper, we describe the challenge of developing and empl...
متن کاملBayesian joint estimation of non-Gaussianity and the power spectrum
We propose a rigorous, non-perturbative, Bayesian framework which enables one jointly to test Gaussianity and estimate the power spectrum of CMB anisotropies. It makes use of the Hilbert space of an harmonic oscillator to set up an exact likelihood function, dependent on the power spectrum and on a set of parameters αi, which are zero for Gaussian processes. The latter can be expressed as serie...
متن کاملHolonomy Corrections to the Cosmological Primordial Tensor Power Spectrum
Loop quantum gravity is one of the leading candidate theory to non-perturbatively quantize gravity. In this framework, holonomy corrections to the equation of propagation of gravitons in a FLRW background have been derived. We investigate the consequences of those corrections on the tensor power spectrum in de-Sitter and slow-roll inflations, for n=-1/2. Depending on the value of the Barbero-Im...
متن کاملCompression of Anisotropic Tensor-product Discretizations
This paper is concerned with the discretization and compression of integral operators. It continues the work of [19]. Based on the framework of tensor-product biorthogonal wavelet bases we construct compression schemes for operator adapted sparse grid type discretizations. These discretization and compression schemes preserve the approximation order of the standard full-grid spaces. We give det...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Cosmology and Astroparticle Physics
سال: 2018
ISSN: 1475-7516
DOI: 10.1088/1475-7516/2018/02/011