Departament d'Estructura i Constituents de la Matèria: Envíos recientes
Mostrando ítems 21-40 de 69
Some theoretical and experimental aspects of axion physics
In this thesis we study axions, a byproduct of the Peccei-Quinn solution to the strong CP problem, which are also a viable candidate for the dark matter content of the Universe. In the first part of the thesis, we ...
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 ...
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 ...
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 ...
Mechanical instabilities and dynamics of living matter. From single-cell motility to collective cell migration
The thesis belongs to the field of biophysicis, in particular we evaluate from a physicial perspective biological processes that occur at the celular and multicelular scales involving collective phenomena of self-organization. ...
Searching for P- and CP- odd effects in heavy ion collisions
In this thesis we study the possibility that QCD breaks parity at high temperatures and densities, a scenario that may be tested in heavy ion collisions. We present two different approaches to this problem. On the one hand, ...
Imbibition in a model open fracture. Capillary rise, kinetic roughening, and intermittent avalanche dynamics
The dynamics of fractured media flows is relevant in many processes of interest that range from the micrometre to the kilometre lengthscales. Flow in disordered media has been proven to be an interesting system to study ...
On the origin of masses at the LHC
In this thesis we present several studies on the origin of masses at the LHC. First we study the indirect effects of new physics on the couplings of the recently discovered Higgs boson and on the electroweak symmetry ...
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 ...
Red Blood Cell mechanics: from membrane elasticity to blood rheology
The mechanics and elasticity of red blood cells (RBCs) determine the capability to deform of these cells when passing through the thinnest capillaries, where the delivery of oxygen takes place. The understanding of the ...
Stochastic Effects in Quorum Sensing
Stochastic fluctuations, or noise, are ubiquitous in biological systems and play an important role in many cellular processes. Experimental evidences have shown that noise affects the reliability of cell coordination in ...
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 ...
Non-mesonic weak decay of hypernuclei in effective field theory
In this thesis we have described the weak Lambda N to NN interaction, which is the main responsible for the decay of heavy hypernuclei, within the effective field theory (EFT) framework. The EFT is developed up to second ...
Theories of modified gravity and reconstruction schemes of cosmological models
En esta memoria de tesis se expone el trabajo llevado a cabo por el doctorando durante los últimos cuatro años, el cual versa principalmente sobre diversos aspectos de soluciones cosmológicas obtenidas a partir de teorías ...
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 ...
Inclusive b-jet production cross section measurement at LHCb
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 ...
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 ...
Parton Distribution Functions for Precision LHC Phenomenology
The main problematics related to the determination of a set of Parton Distribution Functions (PDFs) are presented and, after a brief discussion on different strategies adopted by other groups to address them, the NNPDF ...
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 ...
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 ...
