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 7 of 7 for “"spacetime geometry"”.
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Star Clusters and Dark Matter as Probes of the Spacetime Geometry of Massive Black Holes
<p>This thesis includes two main projects. In the first part, we assess the feasibility of a recently suggested strong-field general relativity test, in which future observations of a hypothetical class of stars orbiting very close to the supermassive black hole at the center of our galaxy, known …
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Beyond Geometry: Conceptual Foundations of a Force-Based Theory of Gravity
… interaction rather than just a manifestation of spacetime geometry. On this basis, we construct a corresponding theory of gravity that appears as a deformation of General Relativity and, at the same time, as a natural extension of Yang–Mills gauge theories. The standard gauge interactions thus …
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Simulation of curved-space quantum field theories with two-component Bose-Einstein condensates: from black-hole physics to cosmology
… the dynamics of quantum fields in curved spacetimes using sound-waves propagating in moving fluids: a supersonic flow would indeed influence the dynamics of sound similarly to what happens to light when it’s dragged by the spacetime geometry in strong gravity environments. This simple yet …
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Some Numerical and Phenomenological Studies in Loop Quantum Cosmology
… is the occurrence of the quantum bounce when the spacetime curvature becomes comparable to the Planck scale. The presence of quantum bounce greatly modifies the dynamics of the early universe and can have important implications for observational signatures. Although the quantum bounce has been …
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Quantum Corrected and Nonsingular Black Holes: Theoretical and Phenomenological Aspects
… impact on the structure of black-hole horizons, spacetime singularities and the observable phenomenology. A quantum-corrected BTZ black hole constructed on a brane in AdS4 spacetime is first examined, providing evidence that these quantum effects strengthen the weak cosmic censorship, thereby …
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Tensorial spacetime geometries carrying predictive, interpretable and quantizable matter dynamics
… fields G on a smooth manifold M can serve as a spacetime structure? In the first part of this thesis, it is found that only a severely restricted class of tensor fields can provide classical spacetime geometries, namely those that can carry predictive, interpretable and quantizable matter …
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Tensorial spacetime geometries and background-independent quantum field theory
Famously, Einstein read off the geometry of spacetime from Maxwell's equations. Today, we take this geometry that serious that our fundamental theory of matter, the standard model of particle physics, is based on it. However, it seems that there is a gap in our understanding if it comes to the …