Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"B-mode polarization"”.
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Design and analysis of a quasi-optical beam combiner for the QUBIC CMB interferometer
… to discuss the prospect of observing the CMB B-mode polarization using a novel technique called bolometric interferometry. This was the first meeting of what would later become the QUBIC collaboration. In this thesis we discuss the scientific reasons for CMB observation, we present a detailed …
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Cosmological And Astrophysical Tests Of Modified Gravity
… The cosmological perturbation theory of this model is studied and the predictions on temperature fluctuations of the cmb are found. The second one is drgt massive gravity. In this theory a charged black hole solution is found and compared to those in gr, folloby constraints on the parameter …
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Probes of cosmic inflation: from the CMB to quantum analogues
… inflationary signatures in the temperature and polarization anisotropies of the cosmic microwave background (CMB). The first part of the thesis focuses on parity-odd B-mode polarization patterns, which are a distinctive imprint of primordial gravitational waves (PGW) on large scales. The Simons …
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Effects of Massive Fields on the Early Universe
… dynamics of fluctuations in holographic inspired models of multi-field inflation. We find that the entropy mass $\mu$ (the mass of the fluctuation orthogonal to the trajectory of inflation) satisfies an universal upper bound given by $\mu \leq 3 H / 2$. This bound coincides with the requirement of …
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Post-inflationary non-Gaussianities on the cosmic microwave background
… our universe and helps to establish the standard model in modern cosmology. With the ongoing and future CMB observations, higher precision can be achieved and novel windows will be opened for studying different phenomena. Non-Gaussianity is one of the most exciting effects which fascinate many …