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 11 of 11 for “"Gauge Symmetries"”.
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Gauge symmetries and charged matter in F-theory
… realize a number of string vacua with varying gauge groups, charged matter, and other properties. However, some aspects of F-theory are still not completely understood, particularly those involving charged matter. There is currently no complete classification of all the charged matter …
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Aspects of theories with dynamical, topological or gauge symmetries
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 1994.
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Introduction to supersymmetry
… role in this unification programme. Global symmetries often account for approximate regularities we observe in nature - local or gauge symmetries are understood as basic symmetries which lie at the heart of the interactions of the constituents of matter.
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Theory of Quantum Degenerate Gases
… gas; second, the connection between broken non-gauge symmetries and the appearance of multiple condensates in a Bose gas; third, the role of thermally activated ""phase slip"" events in destroying superfluidity near the critical temperature of a Bose gas; fourth, mechanical instabilities in …
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PHENOMENOLOGY OF THE STANDARD MODEL AND BEYOND
… and interactions that are singlets under SM gauge symmetries. While minimal hidden sector scenarios have been widely studied, models with non-minimal field content and richer dynamics remain less explored. In the first part of this dissertation, we examine both minimal and non-minimal hidden …
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Why Gauge? Conceptual Aspects of Gauge Theory
This thesis is about conceptual aspects of gauge theories. Gauge theories lie at the heart of modern physics: in particular, they constitute the standard model of particle physics. At its simplest, the idea of gauge is that nature is best described using a descriptively redundant language; the …
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Machine Learning and Variational Algorithms for Lattice Field Theory
… families of distributions while capturing symmetries of interest, including translational and gauge symmetries. By variationally optimizing the distribution selected from these families, one can maximize the efficiency of flow-based MCMC. We secondly introduce an approach to 'deform' Monte …
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New effective theories of gravitation and their phenomenological consequences
… objective of this Thesis is to explore Poincaré Gauge theories of gravity and expose some contributions to this field, which are detailed below. Moreover, a novel ultraviolet non-local extension of this theory shall be provided, and it will be shown that it can be ghost- and singularity-free at …
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EXPANSION AFTER INFLATION AND REHEATING WITH A CHARGED INFLATON
… where the inflaton is charged under global/local symmetries. We first explore the effects of the non-linear inflaton dynamics for the generation of matter-antimatter asymmetry in the case where a global $U(1)$ symmetry of the inflaton is weakly broken. We find a parameter range in which the model …
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Real commitment: a coarse-grained approach to reality via alternative theories in physics
… First, I consider the freedom in electrodynamic gauge theories to interpret some or all gauge variables as physical variables, posing the question whether, and to what extent, the electromagnetic potentials can be considered as physically real. I argue it should be an ontology that is signal …
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Numerical Modelling of the Dynamics and Gravitational Radiation of Compact Binaries in General Relativity
… due the lack of coordinate translation symmetries. In flat space, the rate of change of energy-momentum within a finite spacelike volume is equal to the flux integrated over the surface of this volume; for general spacetimes it is necessary to include a volume integral of a source term …