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 19 of 19 for “"Collective phenomena"”.
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Collective Phenomena in Active Systems
<p>This dissertation investigates collective phenomena in active systems of biological relavance across length scales, ranging from intracellular actin systems to bird flocks. The study has been conducted via theoretical modeling and computer simulations using tools from soft condensed matter …
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Collective Phenomena in Excitonic Quantum Matter
… symmetry and the resulting gapless Goldstone collective excitations, which generate unique distinguishing signatures. I first develop a theory for disordered excitonic insulators, which are classified by the symmetries of the introduced impurities. I demonstrate that the Goldstone modes are …
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Characterization of collective phenomena in cuprate superconductors by momentum-resolved electron energy loss spectroscopy
… them, and their relation to related emergent phenomena is necessary for developing a microscopic understanding of this class of materials. The electron-electron interactions that drive the collective electronic state can be described by the dynamic charge susceptibility, χ(q,ω). This quantity …
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Theoretical Studies of Electronic Transport in Gallium-Arsenide Material and Devices Using an Ensemble Monte Carlo Method (Modeling)
… particularly useful since it can include various collective phenomena (e.g., plasmons and self-consistent electric field) as well as both time- and space-dependent simulations.
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Marian Apparitions in Cultural Contexts: applying Jungian depth psychological concepts to mass visions of the Virgin Mary.
This thesis explores collective phenomena, specifically mass visions of the Virgin Mary and examines the case of Marian apparitions in Zeitoun, Egypt. A review of the literature points to a prevailing socio-political approach to examining visions of the Virgin Mary while a psychoanalytical approach …
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On superradiant phase transitions in generalised Dicke models
… The Dicke model of quantum optics describes collective phenomena which occur when light interacts with a many-atom system. In the thermodynamic limit, a so-called Hepp–Lieb superradiant phase transition sets in. A superradiant phase develops for low temperatures or strong coupling between …
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Early time dynamics & longitudinal structure of high-energy heavy-ion collisions
… of both effects in explaining the origin of collective phenomena in small systems.
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Quantum many body physics in single and bilayer graphene
… unusual 2DES, which may give rise to unexpected collective phenomena. However, the vanishing density of states in charge neutral single layer graphene suppresses many body effects, and one has to alter the system to observe strongly ordered states. We consider three ways of accessing quantum many …
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Collective hydrodynamics of soft microparticles in quasi-two-dimensional confinement
… self-steering, and other flow-driven collective phenomena via design of particle shape and channel geometry. We focus on a particular setting: quasi-two-dimensional (q2D) confinement, in which particles are tightly "sandwiched" between parallel plates, free to move in only two …
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The quasi mode-locked regime: glassy disorder and turbulent dynamics in fiber laser
… where intensity fluctuations reveal complex collective behavior. Although this regime may be familiar to experimentalists working with mode-locked lasers, the QML has not been systematically studied in a fiber laser, and only recently has its importance begun to emerge. QML typically appears …
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Heteroepitaxial Interfaces Modify Collective States in Complex Oxides
Complex oxides exhibit a wide range of collective phenomena in isostructural phases. Titanates and manganites are two examples where various members of their groups have close enough lattice constants that strained superlattices involving both kinds of materials grow epitaxially. In this work …
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Dynamical aspects of quantum information and classical simulability
… particles evolve, often giving rise to collective phenomena with no classical counterpart. Understanding these dynamical phases of matter is believed to be typically hard. To simulate such dynamics, we need to either emulate it on a quantum device—acting as a quantum simulator—or, by …
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Two problems about coupled oscillators: transient dynamics and swarming
The conduct of coupled oscillators has long beguiled scientists. Here we study two models of such oscillators. The first is Peskin’s integrate-and-fire model. We focus on the transitory behavior, showing that in its infancy, synchrony looks much like aggregation. In the second model, we consider …
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Physical minimal models of amoeboid cell motility
… their movements with other cells, creating collective behavior. In this thesis, we utilize minimal modeling to investigate single and collective cell motility in three different settings. The key question we strive to answer is whether cell locomotion is a physical process that can function …
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Initialisation, control and readout of a nuclear-magnon quantum register
… as well as the fundamental exploration of collective phenomena. This thesis begins with a pedagogical review of QD physics ranging through its bound states; their coupling to light; and the hyperfine and quadrupolar coupling of the nuclei to the electron. The interplay of these couplings …
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Operator algebra perspectives on interacting quantum systems
… aspect of many-body systems is the emergence of collective phenomena. One collective noise model is an open atomic system in an electromagnetic environment. This model was considered by Dicke in the 50's. In this thesis, we study the entropic decay in Dicke's model and other related collective …
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Multi-scale multiphase modelling of granular flows
… as a continuum because they exhibit many collective phenomena. Recent studies, however, suggest that a continuum law may be unable to capture the effect of inhomogeneities at the grain scale level, such as orientation of force chains, which are micro-structural effects. Discrete element …
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Adsorption Kinetics and Phase Behavior of Particles Adsorbed at an Interface
… properties of the system where many interesting collective phenomena are observed.</p> <p>The determination of phase behavior and, in particular, the nature of phase transitions in two-dimensional systems is often clouded by finite-size effects and by access to the appropriate thermodynamic …
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Felsővezetők diszpozición keresztül módosítható a gazdálkodási gyakorlat - újraszocializáció révén az implicit öko-fenntarthatóság felé = Business Practice can be Changed via the Dispositions of Executives: Re-socialization towards Implicit Eco-sustainability
… stereotypes of behavior and comprehension – are collective phenomena, the components of collective behavior and they function as a system (as habitus). The logic of dispositions and the logic of rational calculation (deliberation) appear as equally important driving forces behind collective …