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 12 of 12 for “"Vacuum Energy"”.
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Exploring the String Landscape: The Dynamics, Statistics, and Cosmology of Parallel Worlds
… dissertation explores various facets of the low-energy solutions in string theory known as the string landscape. Three separate questions are addressed - the tunneling dynamics between these vacua, the statistics of their location in moduli space, and the potential realization of slow-roll …
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Beyond the Standard Models of Particle Physics and Cosmology
… perturbative anomaly inflow, and new probes of vacuum energy in neutron stars and gravitational waves.</p>
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Beyond The Standard Models Of Particle Physics And Cosmology
… perturbative anomaly inflow, and new probes of vacuum energy in neutron stars and gravitational waves.</p>
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Investigation into compactifed dimensions : Casimir energies and phenomenological aspects.
… this dissertation is the notion of the quantum vacuum. To a particle physicist, the term 'vacuum' means the ground state of a theory. In general, this ground state must obey Lorentz invariance, at least with regards to 3 spatial dimensions, meaning that the vacuum must look identical to all …
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Foundational Investigations & Astronomical Implications of Quantum Gravity
… and phenomenologically relevant problem of vacuum energy in quantum gravity. We also present a discussion of some observational implications of this new viewpoint on the problem of vacuum energy. as well as a novel solution to the low entropy and arrow of time puzzles of the initial state of …
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Obstacles to realizing Quintessence from String Theory
… negative terms and thus significantly raises the vacuum energy. To cancel the F-term, it would take an equally large negative contribution, which is currently unknown. In the context of the de Sitter swampland conjecture, this "F-term problem" raises yet another question. If we manage to cancel …
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Measuring the Cosmological Constant Through the Lyman -Alpha Forest Using the Alcock -Paczynski Test
… topic in cosmology is the determination of the energy densities of the major components of the Universe---OB, O DM and OLambda. Among these, the cosmological constant OLambda, which associates with the vacuum energy of our universe, draws specific attentions for its importance in fundamental …
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Nonperturbative study of SU(N) Yang–Mills theory with gauge invariant condensates of mass dimension two
… be essential for a nonperturbative study of the vacuum of these theories, and it has already been studied from several points of view in the literature. This condensate gives the gluon an effective mass, offering a much needed solution to many a low-energy problem. It has turned out to be …
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Casimir Force in Non-Planar Geometric Configurations
The Casimir force for charge-neutral, perfect conductors of non-planar geometric configurations have been investigated. The configurations were: (1) the plate-hemisphere, (2) the hemisphere-hemisphere and (3) the spherical shell. The resulting Casimir forces for these physical arrangements have …
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UV-sensitivity in quantum gravity and path integral measure [Sensibilità UV in gravità quantistica e la misura del path integral]
I calcoli usuali dell’azione (Euclidea) efficace in gravità quantistica, tipicamente realizzati con il formalismo heat-kernel, danno luogo a contributi quarticamente e quadraticamente sensibili all’UV (scala di Planck) nell’energia del vuoto $\rho_{vac}=\Lambda_{cc}/8\pi G$, dove $\Lambda_{cc}$ e …
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The Dynamics of Gas-Surface Energy Transfer in Collisions of Diatomic Gases with Organic Surfaces
… understanding of the interaction dynamics and energy transfer between gas molecules and surfaces is essential for the study of various chemical reactions. The collisions of diatomic molecules on organic surfaces are crucial to the study of atmospheric chemistry. Molecular beam scattering …
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Interfacial Energy Transfer in Small Hydrocarbon Collisions with Organic Surfaces and the Decomposition of Chemical Warfare Agent Simulants within Metal-Organic Frameworks
A molecular-level understanding of gas-surface energy exchange and reaction mechanisms will aid in the prediction of the environmental fate of pollutants and enable advances toward catalysts for the decomposition of toxic compounds. To this end, molecular beam scattering experiments performed in an …