Àrea de contingut
Universitat de Barcelona
Browsing Departament d'Estructura i Constituents de la Matèria by Subject "53"
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Ads/CFT Correspondence and Superconductivity: Various Approaches and Magnetic Phenomena
The AdS/CFT correspondence is one of the most important developments in the history of theoretical physics. Using as a binding bridge superstring theory, or, more concretely, some theoretical aspects in the interaction ...
Applications of Supersymmetry: Exact Results, Gauge/Gravity Duality and Condensed Matter
The study of supersymmetry has led us to a better understanding of field theories, specially in the strong coupling regime. In this thesis we have tried to show this through several examples. These are: - The first of ...
Applied Gauge/Gravity Duality from Supergravity to Superconductivity
The sequence of chapters can be divided into three blocks. - The first block contains the introductory chapters. In chapter 1 we illustrate the problem of the high-Tc superconductors making a parallelism between the ...
Avalanches in Out of Equilibrium Systems: Statistical Analysis of Experiments and Simulations
Instead of a linear and smooth evolution, many physical system react to external stimuli in avalanche dynamics. When an out of equilibrium system governed by disorder is externally driven the evolution of internal variables ...
Brassinosteroids role in arabidopsis root development : theoretical and experimental approaches
This PhD thesis represents an advance in the present understanding of the spatiotemporal control of model plant Arabidopsis thaliana root growth and development. The size and structure of a living organism are tightly ...
Dynamics of cellular decision making processes
Cells, either as unicellular organisms or as part of a tissue of a multicellular organism, can acquire different functions thanks to their capability of changing their expression state. The enzyme synthesis, cell division ...
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 ...
Electronics control and signal processing for the LHCb fast calorimeter detectors
LHCb is one of the four large experiments of the Large Hadron Collider (LHC) based at CERN. The LHCb experiment is taking data at its nominal design luminosity. However, in order to distinguish among models of new physics, ...
Entanglement and Quantum Cryphtography
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 ...
Entanglement, quantum phase transitions and quantum algorithms
From the seminal ideas of Feynman and until now, quantum information and computation has been a rapidly evolving field. While at the beginning, physicists looked at quantum mechanics as a theoretical framework to describe ...
Fluctuations, gene circuit architecture and stem cell quiescence
Biological development is a complex process in which, from a single cell, a whole multicellular organism arises. The formation of this intrincate structures requires a very precise regulation in space and time. This ...
Front Microrheology of biological Fluids
Since Poiseuille times, several techniques has been developed to measure the viscosity of blood. During the 60's and 70's, with the appearance of the first rheomethers, the rheological properties of blood were accurately ...
Interplay between anisotropy and disorder in ferroelastics: structures and thermodynamics
[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 ...
Josephson effect in multicomponent Bose-Einstein condensates
In this thesis we study and characterize the behavior of Bose-Einstein condensates in a BJJ, using two different theoretical formalisms: the mean-field approximation (with the Gross-Pitaevskii equation) and many-body ...
Magnetisme i estructura en aliatges funcionals = Magnetism and structure in functional alloys
Bé sigui el canvi de temperatura que experimenta un material a l’aplicar-li un camp magnètic en condicions adiabàtiques, o bé sigui el canvi d’entropia del material com a conseqüència de la modificació del camp magnètic en ...
New Physics in the Electroweak Sector Under Scrutiny at LHC
For more than half a century, colliders have been in the forefront of studying the Standard Model (SM) predictions. The pinnacle of both SM and colliders occurred when on July the 4th 2012, at CERN Large Hadron Collider, ...
Noise, coherent activity and network structure in neuronal cultures
In this thesis we apply a multidisciplinary approach, based on statistical physics and complex systems, to the study of neuronal dynamics. We focus on understanding, using theoretical and computational tools, how collective ...
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 ...
Pattern formation through lateral inhibition mediated by Notch signaling
Multicellular organisms are constituted by different kinds of cells which are arranged in a particular way, forming tissues with specific functions. The organization of these different cells can give rise to regular ...
Self-consistent Green's functions with three-body forces
The quantum many-body problem is an everlasting challenge for theoretical physics. The aim sought is to analyze, at the quantum level, the observables arising from a group formed by a certain number of interacting particles ...
