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.
Results
Showing 1 to 20 of 25 for “"spontaneous symmetry breaking"”.
-
Spontaneous symmetry breaking transport : from anomalous response to chiral separation
… may be dynamical states of sustained transport spontaneously breaking the symmetry in the deterministic limit, named spontaneous symmetry breaking transport. If the symmetry of the dynamics is broken by a small perturbation, e.g. a constant bias force, the particle mobility may be in practically …
-
Topology, localization, and spontaneous symmetry breaking in nonequilibrium many-body systems
… on three aspects: topology, localization, and spontaneous symmetry breaking.
-
A quantum field theory for the interaction of pions and rhos
… masses for the vector mesons were generated via spontaneous symmetry breaking using the Higgs mechanism. The Lagrangian was then quantized and gauge fixed using the generalized class of Rɛ gauges. Tree scattering lengths were calculated for pion-pion scattering and the values for the a₀⁰ and a₀² …
-
Statistical mechanics of strongly driven Ising systems
… A novel type of phase transition related to spontaneous symmetry breaking and dynamic freezing occurs which depends on the strength of the driving field. The complex analytic structure of the stationary magnetization distributions is shown to range from singular-continuous with euclidean or …
-
Multipole Symmetries and Many Body Physics
… accompanied by unconventional patterns of spontaneous symmetry breaking. The fermionic versions on the other hand are shown to host exotic non-Fermi liquids. We also report progress on understanding the ramifications that multipole conservation has for diffusion, showing that it leads to …
-
The standard model in 5D : theoretical consistency and experimental constraints
… of the Rxi-gauge and the interplay between spontaneous symmetry breaking and compactification. Confronting the observables in 5D standard model extensions with combined precision measurements at the Z-boson pole and the latest data from LEP2, we constrain the possible size R of the extra …
-
Aspects of transport in strongly correlated systems with gravity duals
… one dual to a quantum critical point with spontaneous symmetry breaking, and the other modelled by a charged scalar that condenses at a sufficiently low temperature in the presence of a Maxwell field. In the large dimensionality limit we obtain explicit analytical results for the …
-
Collective excitations in low dimensional systems and stochastic control of population growth in a fluctuating environment
… This theory explicitly explores the idea of spontaneous symmetry breaking and its application in the description of phase transitions of confined systems. Based on the effective lagrangian, I calculate the excitation spectrum and Matsubara Green's functions using the method of functional …
-
Looking Beyond the Standard Model from the Lattice
… theory techniques, to understand the inherent symmetry breaking patterns of three specific BSM (beyond the standard model) theories. The first model (in chapter 3) describes the spontaneous symmetry breaking pattern in a two dimensional, eight supercharge supersymmetric Yang-Mills theory. We …
-
Statistical Physics of Soft Random Solids: Vulcanization, Heterogeneity, and Elasticity
… theory, associated with a subtle form of spontaneous symmetry breaking that is associated with the liquid to random solid transition. The resulting free energy of these Goldstone modes can be reinterpreted as arising from a phenomenological description of an elastic medium with quenched …
-
Equivariant symmetry breaking sets
… equivariant networks are unable to produce lower symmetry outputs given a high symmetry input. Spontaneous symmetry breaking occurs in many physical systems where we have a less symmetric stable state from an initial highly symmetric one. Hence, it is imperative that we understand how to …
-
Interaction effects in topological insulators
… related to topological insulators. With the spontaneous symmetry breaking mechanism, we can have an interaction driven topological insulator with extended Hubbard models on the kagome lattice and decorated honeycomb lattice. For the interplay among spin-orbit coupling, distortion and …
-
Calculation of interface tension and stiffness in a two dimensional Ising Model by Monte Carlo simulation
… condensed matter systems. At low temperatures, spontaneous symmetry breaking occurs such that two coexisting phases are separated by interfaces. These interfaces can be described as vibrating strings and are characterized by their tension and stiffness. Then the partition function can be …
-
Effective Actions for Strongly Interacting Fermionic Systems
… systems featuring bosonic bound states (BBS) and spontaneous symmetry breaking (SSB). In a purely fermionic language proceeding into the SSB phase requires techniques beyond perturbation theory and renormalization group equations. Improvement comes from a description with BBS fields and elementary …
-
The Death of Quasiparticles: Strongly Interacting Gapless Phases with Fermi Surfaces and Fractional Statistics
… of Hertz-Millis models describing the onset of spontaneous symmetry breaking in a metallic environment. At the quantum critical point, gapless order parameter fluctuations destroy quasiparticles living on the Fermi surface, giving rise to a strongly coupled non-Fermi liquid metal. A key result …
-
Phenomenology of the minimal <i>B - L</i> extension of the Standard Model at the LHC
… model also encompasses a complex scalar for the spontaneous symmetry breaking of the extended gauge sector and to give mass to the <i>Z'</i> boson. We present the phenomenology, the discovery potential at the LHC, and the most up-to-date experimental and theoretical limits of the new particles in …
-
Vortices, Painlevé integrability and projective geometry
… recently proposed by Manton are actually symmetry reductions of (anti-)self-dual Yang-Mills equations with suitable gauge groups and symmetry groups acting as isometries in a 4-manifold. As a consequence, the twistor integrability results of such vortices can be derived. It is presented a …
-
Invertible Functorial Field Theory for Symmetry Breaking and Interactions in Quantum Field Theory
… model three related processes around a form of spontaneous symmetry breaking via a charged order parameter using a twisted Gysin sequence of Anderson-dual bordism groups. We study the Smith maps of Madsen-Tillmann spectra that underlie the sequence, collecting examples and cataloging …
-
Ultrafast photoinduced dynamics of low-dimensional excitonic materials at room temperature
… use the frameworks of elementary excitations and symmetry breaking as starting points to understand two low-dimensional materials. With ultrafast spectroscopic measurements, we probe these materials at room temperature and in non-idealised regimes, building on where these frameworks fall short. We …
-
Strong correlations and topological order in one-dimensional systems
… between non-trivial topology (fermions) and spontaneous symmetry breaking (spins) in one-dimension is investigated. Building on this connection, a spin ladder system endowed with vortex degrees of freedom is proposed in order to study the effects that inhomogeneous potentials have on the …
Page 1 of 2