Departament d'Estructura i Constituents de la Matèria: Enviaments recents
Ara mostrant els elements 41-60 de 69
Structure and dynamics of liquid helium systems and their interaction with atomic dopants and free electrons
This thesis presents a collection of four papers published in peer-reviewed scientific journals plus a manuscript yet to be submitted, all of them in the field of low temperature physics and quantum fluids. Each of these ...
Oscillatory pipe flow of wormlike micellar solutions
Wormlike micelles are viscoelastic fluids that present an intermediate behavior between solids and ordinary liquids since they are elastic at short time scales but flow easily at large time scales. In opposition to Newtonian ...
Mechano–chemical study of rotatory molecular motors
Cells are the minimum unit of life. They are born, they eat, the may grow, they may move, and, eventually, they die. By contrast, from a physicist point of view, cells are systems out of equilibrium continuously transducing ...
Turbulent bubble suspensions and crystal growth in microgravity. Drop tower experiments and numerical simulations
We study the formation and spreading of a turbulent jet of bubbles in microgravity. This has been analyzed from the recordings obtained in previous experimental campaigns of microgravity. Results have been compared with a ...
Spontaneous generation of geometry and its possible consequences
In this thesis a viable theory of gravity resulting from the spontaneous symmetry breaking of some more fundamental theory is developed. This fundamental theory does not include any notion of a metric or geometry. All the ...
Flavour Tagging developments within the LHCb experiment
Flavour Tagging at the LHCb experiment is a fundamental tool for the measurement of B oscillations and the study of CP violation. This document explains the development of different tagging techniques and the different ...
Explicit Bound states and Resonance fields in Effective Field Theories
The first three chapters of this thesis have been devoted to the theoretical background. We presented the novel work of this thesis in chapters 4 and 5. In chapter 4 we have constructed a Chiral effective field theory for ...
First measurements of radiative B decays in LHCb
Radiative decays of B mesons, a good example of Flavor Changing Neutral Currents, are interesting for the study of physics beyond the Standard Model, as new high-energy phenomena can enter in the loop. The LHCb experiment, ...
Charmed baryon resonances and mesons in hot and dense matter
In this thesis we have studied baryon resonances generated from the dynamical interaction of two hadrons. We are interested on this study as an alternative approach to explain the increasing number of observed charmed ...
Effects of the dipole-dipole interaction on the physics of ultracold quantum gases
In this thesis we study the effects of the dipole-dipole interaction on the physics of ultracold quantum gases, both bosonic and fermionic, within the theoretical framework provided by the mean-field regime. This kind of ...
Estudi experimental de la dinàmica d'un front fluid en un medi desordenat
La imbibició és un procés de transport de fluids immiscibles en un medi desordenat en el qual el fluid que mulla preferentment el medi desplaça el fluid resident. La interfície que separa aquests dos fluids esta sotmesa a ...
Entanglement in Many Body Quantum Systems
THESIS SUMMARY<br/><br/>TEXT:<br/><br/>This thesis is made of two parts. In the first one, the issue of entanglement in many body systems is addressed. The concept of entanglement and some of the recent progress on the ...
Colisiones de partículas cargadas. Modelos de interacción y algoritmos numéricos
En esta tesis se reformulan de manera detallada la primera aproximación de Born relativista con ondas planas (PWBA), para colisiones inelásticas de electrones, positrones y partículas pesadas con átomos o iones, suponiendo ...
Contribución al estudio de las aleaciones de Cu-Zn-AI mediante calorimetría y emisión acústica
Hay un gran número de aleaciones que experimentan transformaciones martensíticas termoelásticas (Au-Cd, Ti-Ni, Cu- Zn- Al, Cu- Al- Mo) y, en consecuencia, presentan ciertas propiedades termomecánicas que los convierten en ...
Estudi de la influència de l'estat d'ordre atòmic en les transicions martensítiques
Els sistemes objecte d'estudi en aquest treball són aliatges metàl·lics d'estructura reticular b.c.c. els quals, a baixes temperatures, experimenten una transició de fase estructural de tipus martensític (bàsicament descrita ...
Nonmesonic weak decay of Hypemuclei, The
In single A hypernuclei, a A hyperon can occupy any orbital in the hypernucleus since it is free from the Pauli exclusion principle due to its additional quantum number strangeness. <br/><br/>Due to the Pauli blocking ...
Estudio de la dinámica estocástica mediante tiempos de primer paso
La caracterización de sistemas por medio de sus tiempos característicos es sujeto de investigación tanto teórica como experimental. Posiblemente el tiempo característico más conocido y más ampliamente utilizado es el Tiempo ...
Simulació Monte Carlo de sistemes amb acoblament de graus de llibertat
Els models microscòpics usuals que es proposen en Mecànica Estadística descriuen, únicament, un tipus de grau de llibertat. Aquests models permeten explicar algunes transicions de fase que es troben en els diagrames de ...
Semiclassical approach to relativistic nuclear mean field theory
The nuclear many-body problem is nowadays being increasingly approached on the basis of a relativistic formalism. Microscopic Dirac-Brueckner-Hartree-Fock (DBHF) calculations starting from a realistic nucleon-nucleon ...
Model d'Ising amb camps aleatoris: propietats i aplicacions
S:<br/><br/>L'objectiu principal d'aquesta tesi és aprofundir en l'estudi dels models microscòpics que permeten estudiar la histèresi. Aquest fenomen està present en moltes àrees de la física i ha despertat l'interès de ...
