Heredia Pimienta, Carlos (Date of defense: 2023-03-31)
[eng] This thesis aims to study nonlocal Lagrangians with a finite and an infinite number of degrees of freedom. We obtain an extension of Noether's theorem and Noether's identities for such Lagrangians. ...
Maneu Victoria, Jordi (Date of defense: 2019-12-20)
Double § hypernuclei are bound systems of several nucleons and two § hyperons. These systems are unstable with respect to the weak interaction and chiefly decay through two-body processes that conserve ...
Torrents Verdaguer, Genís (Date of defense: 2016-06-27)
Maldacena's conjecture, often known as the holographic duality or the AdS/CFT correspondence, proposes an equivalence between gravitational theories in a hyperbolic space of a certain dimensionality and ...
Morera Navarro, Ivan (Date of defense: 2023-07-10)
[eng] In this Thesis we explore exotic phases of matter which arise when different mechanisms compete and favor different ground state configurations. We focus on two classes of low dimensional lattice ...
Triana Iglesias, Miquel (Date of defense: 2017-09-21)
The gauge/gravity duality has proven to be a very useful tool in the understanding of quantum field theories outside the perturbative regime. In particular, holography has been able to shed light not ...
Alsina Leal, Daniel (Date of defense: 2017-09-18)
Quantum information science has grown from being a very small subfield in the 70s until being one of the most dynamic fields in physics, both in fundamentals and applications. In the theoretical section, ...
Feijoo Aliau, Albert (Date of defense: 2017-09-21)
The purpose of this thesis has been to study the S=-1 meson-baryon interaction in S-wave employing an effective chiral SU(3) lagrangian up to NLO and implementing unitarization in coupled channels. Such ...
Esteban Muñoz, Iván (Date of defense: 2020-09-10)
At the end of the 20th century, experiments studying neutrinos coming from the Sun and cosmic rays hitting the atmosphere revealed that these particles can change their flavour, behaving in a way that ...
Illa Subiña, Marc (Date of defense: 2021-09-09)
Nuclei make up the majority of the visible matter in the Universe; obtaining a first principles description of the nuclear properties and interactions between nuclei directly from the underlying theory ...
Montaña Faiget, Glòria (Date of defense: 2022-07-08)
For many decades after the conception of the quark model in 1964, and the development of quantum chromodynamics (QCD) a few years later as the theory governing the strong interaction between quarks and ...