Universitat de Barcelona
Now showing items 21-40 of 68
The main contribution of this thesis concerns the application of the Luttinger-Ward formalism to the study of the thermodynamical properties of nuclear matter. This formalism is devoted to compute the different thermodynamical ...
Quantum cryptography is one of the most important quantum information applications. The present thesis covers several topics on quantum cryptography, such as the security analysis of quantum channels for key distribution ...
[spa] Durante la tesis se realizó un estudio experimental de inestabilidades hidrodinámicas en dos sistemas muy diferentes. Estudiamos inestabilidades laterales en dedos de Saffaman-Taylor sujetos a dos tipos de ...
We have investigated several properties of semiconductor electronic nanostructures. In the first part of the thesis, within the density functional theory we have addressed the ground state and the dipolar response of quantum ...
[eng] The discovery of molecular motors was not a single and isolated event but a set of gradual approaches from microscopic to nanoscopic systems. For example, the knowledge of the activity of muscle cells is pretty old, ...
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 ...
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 ...
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 ...
[spa] Esta tesis se enmarca dentro del estudio de los efectos de inhomogeneidades en materiales funcionales, dentro de los cuales podemos citar a los materiales que presentan magnetoresistencia colosal, superconductores ...
[spa] El proyecto de tesis está enfocado en el estudio de la evolución del Universo y más concretamente en la explicación del mecanismo que produce su actual expansión acelerada, y que probablemente sea el mismo que ha ...
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 ...
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 ...
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, ...
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 ...
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 ...
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 ...
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 ...
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 ...
The LHCb detector features an outstanding capability to identify displaced secondary vertices with respect to the interaction point. The extraordinary performance of the whole LHCb tracking system makes possible accurate ...
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 ...
