Browsing by Contributor "Boronat Medico, Jordi"
Now showing items 1-20 of 27
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Ab-initio quantum Monte Carlo study of ultracold atomic mixtures
(Universitat Politècnica de Catalunya, 2021-04-20)
Doctoral thesis
Open AccessThe properties of mixtures of Bose-Einstein condensates at T=0 have been investigated using quantum Monte Carlo (QMC) methods and Density Functional Theory (DFT) with the aim of understanding physics beyond the mean-field ... -
Bose-Bose mixtures at finite temperature
(Universitat Politècnica de Catalunya, 2019-06-25)
Bachelor thesis
Restricted access - author's decision -
Classical and quantum simulations of dislocations in crystals
(Universitat Politècnica de Catalunya, 2016-10-17)
Bachelor thesis
Open Access
Covenantee: University of New South Wales -
Contact interactions in path integral Monte Carlo simulations
(Universitat Politècnica de Catalunya, 2016-06-20)
Bachelor thesis
Open AccessIn very dilute Bose gases the full interatomic interaction can be well modeled by the s-wave scattering length defining the strength of a contact interaction. To introduce this kind of potential in quantum simulations is ... -
Correlations in spin-orbit coupled ultracold quantum gases
(Universitat Politècnica de Catalunya, 2020-12-14)
Doctoral thesis
Open AccessThe main goal of this thesis is the computation of ground state properties of quantum many-body systems under Spin Orbit coupling (SOC) interactions out of the ultradilute regime. We present two approaches to fulfill this ... -
Design and construction of optical superlattices for a quantum gas experiment
(Universitat Politècnica de Catalunya, 2015-10)
Bachelor thesis
Open AccessIn recent years ultracold atomic gases have emerged as a new and promising platform for exploring the physics of quantum many-body systems, allowing researchers to revisit fundamental problems of condensed-matter physics ... -
Dicke superradiance in atomic arrays: impact of dimensionality
(Universitat Politècnica de Catalunya, 2021-10-01)
Bachelor thesis
Open Access
Covenantee: Columbia UniversityEls efectes colectius són un àmbit de creixent interès en l'estudi de les interaccions llum-matèria a nivell quàntic. Aquest treball es centra en un d'aquests efectes conegut com la superradiància de Dicke, en la qual un ... -
Estudi de l'3He bidimensional amb mètodes de Monte Carlo quàntics
(Universitat Politècnica de Catalunya, 2001-07-16)
Doctoral thesis
Open Accessde la tesi <br/>En aquest treball es presenta un estudi de l'3He a temperatura zero combinant les tècniques de Monte Carlo variacional (VMC) i la difusiva (DMC) amb nodes fixos (FN) i relaxació dels nodes (RN). <br/>L'estudi ... -
Explorations of thermodynamics and information in quantum field theory
(Universitat Politècnica de Catalunya, 2020-05-20)
Bachelor thesis
Open Access
Covenantee: Institute for Quantum Computing / University of WaterlooPodria dir-se que la termodinàmica ha sigut una de les rames més poderoses de la física, i la més universal per la seva varietat d'aplicacions. Des de motors de vapor fins a forats negres, les lleis de la termodinàmica ... -
Highly degenerate Fermi gases
(Universitat Politècnica de Catalunya, 2020-10-09)
Master thesis
Open AccessThe aim of this work is to study a dilute Fermi gas, whether it has a spin 1/2 or it has a high degeneracy. The starting point is to calculate the energy of the system. However, as we are dealing with a many body system, ... -
Microscopic description of confined bosonic dipolar quantum gases in two dimensions
(Universitat Politècnica de Catalunya, 2015-06-21)
Bachelor thesis
Open AccessWe present a microscopic description of the two dimensional quantum few body problem involving confined polarized bosons. Due to anisotropy of the dipolar interaction, the system presents an interesting behaviour in terms ... -
Microscopic description of two dimensional dipolar quantum gases
(Universitat Politècnica de Catalunya, 2015-02-13)
Doctoral thesis
Open AccessA microscopic description of the many-body properties of anisotropic homogeneous gases of bosonic dipoles in two dimensions is presented and discussed. By changing the polarization angle with respect to the plane, we study ... -
Mixtures of quantum dipolar gases: mixing and demixing
(Universitat Politècnica de Catalunya, 2021-07-13)
Bachelor thesis
Open AccessPresentem un anàlisis microscòpic de una barreja binaria de bosons dipolars a temperatura cero confinada en el pla xy amb moments dipolars (magnètics) permanents en la direcció z. Les interaccions dipol-dipol són repulsives ... -
A Monte Carlo approach to statics and dynamics of quantum fluids
(Universitat Politècnica de Catalunya, 2017-09-16)
Doctoral thesis
Open AccessThe main objective of the thesis is to study static and/or dynamic properties of a set of quantum fluids by means of quantum Monte Carlo techniques, mainly using the path integral formalism to obtain results both at zero ... -
Monte Carlo study of quantum phase transitions at zero temperature
(Universitat Politècnica de Catalunya, 2012-12-20)
Doctoral thesis
Open AccessThe Thesis is devoted to simulations of quantum phase transitions by means of Quantum Monte Carlo techniques. Quantum phase transition is a transition between phases at zero or low enough temperature, where quantum effects ... -
Novel applications of Photonic Force Microscopy
(Universitat Politècnica de Catalunya, 2008-10-23)
Doctoral thesis
Open AccessThe ability of detecting farces and torques at the micro-and nano-scale is fundamental. When this Thesis started, various scanning probe techniques had already been developed to probe the mechanical properties of microsystems. ... -
One dimensional quantum gases: from few to many
(Universitat Politècnica de Catalunya, 2016-07-07)
Bachelor thesis
Open Access
Covenantee: Università degli studi di TrentoThe main objective of this project is to find the binding energy of an impurity interacting with a one-dimensional bosonic system of increasing size for different coupling strengths g. Both the bosons as well as the impurity ... -
Path Integral Monte Carlo and Bose-Einstein condensation in quantum fluids and solids
(Universitat Politècnica de Catalunya, 2011-12-20)
Doctoral thesis
Open AccessSeveral microscopic theories point out that Bose-Einstein condensation (BEC), i.e., a macroscopic occupation of the lowest energy single particle state in many-boson systems, may appear also in quantum fluids and solids ... -
Path integral Monte Carlo. Algorithms and applications to quantum fluids
(Universitat Politècnica de Catalunya, 2002-07-11)
Doctoral thesis
Open AccessPath integral Monte Carlo (PIMC) is a method suitable for quantum liquid simulations at finite temperature. We present in this thesis a study of PIMC dealing with the theory and algorithms related to it, and then two ... -
Probing the near-field optical response of plasmon nanostructures with two-photon luminescence microscopy
(Universitat Politècnica de Catalunya, 2009-04-02)
Doctoral thesis
Open AccessEsta tesis describe el diseño, la fabricación y la caracterización óptica de sistemas plasmónicos resonantes capaces de confinar y aumentar campos de luz en la escala manométrica. En primer lugar, se utilizaron modelos ...
