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.
Results
Showing 1 to 20 of 106 for “"Settore FIS/03 - Fisica della Materia"”.
-
ADIABATIC CONDITIONS FOR FINANCIAL SYSTEMS
In the Black-Scholes context we consider the probability distribution function (PDF) of financial returns implied by volatility smile and we study the relation between the decay of its tails and the fitting parameters of the smile. We show that, considering a scaling law derived from data, it is …
-
QUANTUM COMMUNICATIONS IN CONTINUOUS VARIABLE SYSTEMS
Nowadays, quantum communications provide a vast field of research in rapid expansion, with a huge potential impact on the future developments of quantum technologies. In particular, continuous variable systems, employing coherent-state encoding and quadrature measurements, represent a suitable …
-
From atoms to extended structures via ab-initio and multi-scale simulations
… the theoretical and computational modelling of materials by using a variety of ab-initio approaches to accurately predict the properties of realistic structures. A number of known and novel carbon-based materials are studied, exploiting the unique versatility of carbon to bind into several …
-
Study of Ultracold Fermi Gases in the BCS-BEC Crossover: Quantum Monte Carlo Methods, Hydrodynamics and Local Density Approximation.
In this Thesis we will theoretically address some issues concerning the Physics of ultracold Fermi gases, all of them with experimental relevance. The field of ultracold gases, and more recently of ultracold Fermi gases, is gathering a lot of experimental and theoretical interest for two main …
-
Measurement of the density profile of quantized vortices and of the equation of state in a 3D interacting Bose gas
In this thesis I present two different research topics investigated during the course of my PhD, regarding the analysis of spatial structures in a Bose Einstein condensate. Ultracold atomic gases offer a privileged platform for such kind of experiments, thanks to the fine control that can be …
-
Nanodiamonds for biological applications: Synthesis by laser ablation and sensing of local magnetic environment by optical spectroscopy of NV centers
… , and then by a fast cooling of the molten material in water. I provide a theoretical description of both superheated and undercooled liquids and of the mechanism of phase explosion. The investigation of the link between the metastable liquids (superheated or undercooled) and the synthesis …
-
Localization and spreading of matter waves in disordered potentials
In this thesis we address relevant problems of the physics of quantum disordered systems from a numerical and theoretical point of view, with specific attention to the connection of our findings with ultracold atomic gases experiments. We concentrate on two main issues: the interplay between …
-
Monte Carlo Simulations of Electron Transport in 3D Solids and Molecular Dynamics Simulations of the Mechanics of 2D materials
… transport and mechanical properties of materials using computer simulations. In particular, we dealt with the charge transport in semiconduc- tor and metallic samples and with the peeling of a graphene layer from bulk graphite. The computational methods used to investigate the samples …
-
Investigating Protein Folding Pathways at Atomistic Resolution: from a Small Domain to a Knotted Protein
Although protein folding has been studied for decades many open issues still resist, and we yet lack a clear and general description of the mechanisms leading from the unfolded to the folded state. In particular, it is still under debate whether proteins fold through few well-defined pathways or …
-
A tunable Bose-Einstein condensate for quantum interferometry
The subject of this thesis is the use of BECs for atom interferometry. The standard way atom interferometry is today performed is by interrogating free falling samples of atoms. The employed samples are cold (but not condensed) to have high coherence, and dilute, not to interact significantly with …
Page 1 of 6