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 9 of 9 for “"Big Bang Cosmology"”.
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Topics in Cosmic Acceleration and Braneworlds
… to solve many problems with the standard Hot Big Bang cosmology. In the late universe, cosmic acceleration seems to best explain a wide variety of observations. In both cases, we lack a complete theory of what drives cosmic acceleration. In this thesis I discuss some open issues in our …
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Preheating in multifield inflation
… was proposed to address problems with Standard Big Bang cosmology. The theory suggests the existence of an epoch during which the universe underwent an exponential expansion, followed by an epoch of slower expansion. Realistic models of high-energy physics require multiple scalar fields. …
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Preheating in new Higgs inflation
… a rapid, exponential expansion right after the Big Bang. Inflation solves the so-called "horizon problem," "flatness problem," and "monopole problem" of standard Big Bang cosmology. Furthermore, New Inflation solves the "graceful exit problem" of the original theory. In inflation, the energy …
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Vector fields during cosmic inflation: stability analysis and phenomenological signatures.
… success in resolving the classical problems of big bang cosmology, but also for introducing a natural mechanism for the generation of primordial fluctuations which give rise to the structure (galaxies and cluster of galaxies) in the universe. For simplicity, most inflationary scenarios assume …
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Coupled quantum systems in inflationary cosmology.
… are addressed in the framework of inflationary cosmology. The strict predictions of inflation are mostly in agreement with the Cosmic Microwave Background observations. In the recent years, large scale anomalies in the data motivated a series of analyses leading to a detection of broken …
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Design and Analysis of the Optical Beam Combiner and Corrugated Feed Horns for the QUBIC Instrument
The next major step in Big Bang cosmology will be the detection of primordial B-modes in the polarisation pattern of the Cosmic Microwave Background (CMB). These primordial B-modes are extremely faint and unprecedented levels of sensitivity will be required to detect them. The QUBIC (Q & U …
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Higgs-Portal and Z'-Portal Dark Matters in Brane-World Cosmologies
… the framework of 5-dimensional brane-world cosmology. In this setup, our familiar 3-dimensional space is realized as a hyper-surface embedded in a 4-dimensional space. Within this context, all SM and DM fields are confined to the hyper-surface, while the graviton resides in the bulk. We …
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Footnotes to Footnotes: Whitehead's Plato
… involves: first, an explication of Whitehead’s cosmology and metaphysics and their ostensibly Platonic elements (consisting chiefly in the Timaeus); second, investigation of what motivated his interpretation and appropriation of Platonic cosmology (I emphasize the influence of A.E. Taylor’s …
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Scientific Evolution, Creation Theologies and African Cosmogonies in Dialogue: Toward a Christian Theology of Evolution
This is a dissertation in which the question of cosmic origins is examined from three perspectives, namely, Scientific Theories of Evolution, Christian Theologies of Creation, and African Cosmogonies, respectively. Through the use of comparative-dialogic and dialectic methods, and the application …