This review delves into the utilization of a sextic oscillator within the 𝛽 degree of freedom of the Bohr Hamiltonian to ...

Background: Even-even isotopes of Mo (Z=42) and Ru (Z=44) are nuclei close to the subshell closure at Z=40, where shape ...

The sextic oscillator adapted to the Bohr Hamiltonian has been used to describe even Pt and Os isotopes from A = 188 to ...

The standard Lipkin-Meshkov-Glick (LMG) model undergoes a second-order ground-state quantum phase transition (QPT) and an ...

El objetivo de este trabajo es estudiar como afecta la geometría del núcleo atómico a sus propiedades como sistema cuántico. ...

A digital quantum simulation for the extended Agassi model is proposed using a quantum platform with eight trapped ions. ...

A digital quantum simulation of the Agassi model from nuclear physics is proposed and analyzed. The proposal is worked out ...

The basic Lipkin-Meshkov-Glick model displays a second-order ground-state quantum phase transition and an excited-state ...

A quantum phase transition (QPT) in a simple model that describes the coexistence of atoms and diatomic molecules is ...

The quantum phase transition studies we have done during the last few years for odd-even systems are reviewed. The focus ...

Low-lying collective quadrupole states in even-even nuclei are studied for the particular case of a γ-unstable potential ...

Weakly bound and unbound three-body nuclei are studied by using the pseudostate method within the hyperspherical formalism. ...

La inteligencia artificial y especialmente las redes neuronales están siendo ampliamente utilizadas en física de partículas ...

Parfenova et al. state in [Phys. Rev. C 98, 034608 (2018)2469-998510.1103/PhysRevC.98.034608] that the results presented ...

Two algebraic approaches based on a discrete variable representation are introduced and applied to describe the Stark ...

A beyond mean-field study of the Tavis-Cummings (TC) model is developed. This is the simplest model for describing the ...

El objetivo de este trabajo es demostrar la viabilidad de obtener imágenes médicas con protones, utilizando detectores de ...

We present a number conserving particle-hole RPA theory for collective excitations in the transition from normal to ...

The Rare Earth Peak (REP) is a small, but clearly distinctive, peak around mass A 160 in the elemental solar system ...

This Master Thesis mainly pivots on describing the assembly, preparation and testing of the Decay Total Absorption -ray ...

El objetivo de este trabajo es realizar un estudio sobre las transiciones de fase cuánticas que se presentan en el modelo ...

The Agassi model (Agassi 1968 Nucl. Phys. A 116 49) is a schematic two-level model that involves pairing and monopole-monopole ...

The influence of Franco Iachello in Physics during the last 50 years and, in particular, in the use of algebraic methods ...

El presente trabajo se centra en el estudio de núcleos exóticos ligeros, en concreto, en algunos núcleos denominados núcleos ...

Cross sections for elastic and inelastic scattering of the weakly bound Be9 nucleus on a Sn120 target have been measured ...

Background: The Agassi model [D. Agassi, Nucl. Phys. A 116, 49 (1968)NUPABL0375-947410.1016/0375-9474(68)90482-X] is an ...

Background: Composed systems have become of great interest in the framework of ground-state quantum phase transitions ...

Radiative capture reaction rates for 6He, 9Be and 17Ne formation at astrophysical conditions are studied within a three-body ...

The scattering of 9Be on 208Pb is addressed within a four-body Continuum-Discretized Coupled-Channels (CDCC) framework, ...

Esta memoria de tesis surge con la idea de estudiar sistemas nucleares de interés astrofísico.La comprensión de los procesos ...

A relationship between the Coulomb inclusive break-up probability and the radiative capture reaction rate for weakly bound ...

Background: In the past few decades quantum phase transitions have been of great interest in nuclear physics. In this ...

Background: The breakout from the hot Carbon-Nitrogen-Oxigen (CNO) cycles can trigger the rp-process in type I x-ray bursts. ...

The resonant breakup of 19C on protons measured at RIKEN [Y. Satou et al., Phys. Lett. B 660, 320 (2008)] is analyzed in ...

β -decay rates of 121–131 Cs have been calculated in the framework of the neutron-proton interacting boson- fermion model ...

In this contribution, we review some recent theoretical advances for the calculation of breakup cross sections in reactions induced by weakly-bound nuclei.

We investigate the elastic scattering of 9Be on 208Pb at beam energies above (50MeV) and below (40MeV) the Coulomb barrier. ...

We investigate low-energy Be9 elastic scattering on two different targets (heavy, light) within a four-body framework using ...

Quantum shape-phase transitions in odd-nuclei are investigated within the framework of the interacting boson-fermion model ...

We analyse the resonant break-up of halo nuclei including possible excitations of the core both in the structure of the ...

One-neutron halo nuclei, composed of a weakly bound particle coupled to a core nucleus, are studied within a particle-plus-core ...

We introduce the basic concepts of catastrophe theory needed to derive analytically the phase diagram of the proton–neutron ...

Quantum phase transitions in odd-nuclei are investigated within the framework of the interacting boson-fermion model with ...

The structure of the Borromean nucleus 9Be (α+α+n) is addressed within a three-body approach using the analytical transformed ...

The ground state and spectral properties of Bose gases in double-well potentials are studied in two different scenarios: ...

The effect of core excitation in the elastic scattering and breakup of a two-body halo nucleus on a stable target nucleus ...

The mapping of the single fermion creation operator (ci†) onto the Interacting Boson-Fermion space (IBFM) is revisited ...

Recently, a square-integrable discrete basis, obtained performing a simple analytical local scale transformation to the ...

The analytic THO method [1] is generalized to study three-body nuclei of astrophysical interest, and applied to 6He. Results are consistent with previous publications and experimental data [2, 3].

We study the similarities and differences between the phenomena of Quantum Decoherence and Quantum Quench in presence of ...

The role of core excitation in the structure and dynamics of two-body halo nuclei is investigated. We present calculations ...

The quantum description of a particle moving in a deformed potential is investigated. A pseudostate (PS) basis is used to ...

A recent generalization of the Transformed Harmonic Oscillator basis, intended to consider core excitations in the structure ...

Several aspect of shape phase transitions and critical point symmstries are reviewed inthis contribution within the ...

The Bose-Hubbard model coupled to a Feshbach resonance is studied. Quantum phase transitions are analyzed within a beyond ...

La estructura del presente trabajo queda como sigue. En la sección 1.1 se exponen los modelos que se utilizaran para la ...

In this contribution, the critical behavior of excited state quantum phase transitions (ESQPT's) and its relation to order ...

The validity of the stabilization method in core+valence systems including the possibility of exciting the core is studied. ...

El trabajo se estructura en 6 capítulos. El capítulo 1 posee fundamentalmente un carácter de introducción teórica a las ...

An extension of the Interacting Boson Model that includes the cubic (QI×QI×Q I)(0) term is proposed. The potential energy ...

We study the critical behavior of excited states and its relation to order and chaos in the Jaynes-Cummings and Dicke ...

We present a brief review of research topics of current interest that depend on an algebraic approach to molecular bending ...

Low-lying energy states of the 147 -153Pm isotopic chain are studied within the framework of the neutron-proton interacting ...

We analyze excited-state quantum phase transitions (ESQPTs) in three schematic (integrable and nonintegrable) models ...

Analytical results beyond the mean-field-limit approximation for several observables of the two-dimensional limit of the ...

The connections between the X(5) models [the original X(5) using an infinite square well, X(5)-β8, X(5)-β6, X(5)-β4, and ...

The spherical to deformed γ-unstable shape transition in nuclei is discussed in terms of the sextic oscillator as a ...

Shape phase transitions in odd-A nuclei are investigated within the framework of the interacting boson-fermion model. The ...

The ability of a recently developed square-integrable discrete basis to represent the properties of the continuum of a ...

We investigate the phase transition in odd nuclei within the Interacting Boson Fermion Model in correspondence with the ...

The predictive power of the coherent state (CS) approach to the interacting boson model (IBM) is tested far from the IBM ...

We analyze the decoherence induced on a single qubit by the interaction with a two-level boson system with critical internal ...

A new method for continuum discretization in continuum-discretized coupled-channels calculations is proposed. The method ...

The decoherence induced on a single qubit by its interaction with the environment is studied. The environment is modeled ...

The connections between the Ε(5)-models (the original Ε(5) using an infinite square well, Ε(5) - β4 Ε(5) - β6 and Ε(5) - ...

Various aspects of shape phase transitions in even as well as odd systems are reviewed. Firstly, the case of an odd j 3/2 ...

Recent developments aimed to understand the observed features arising in the scattering of the Borromean nucleus 6He on ...

The recently developed four-body continuum-discretized coupled-channels (CDCC) method, making use of the binning procedure ...

The development of a continuum-bin scheme of discretization for three-body projectiles is necessary for studies of reactions ...

We investigate different aspects connected with shape phase transitions in nuclei and the possible occurrence of dynamical ...

In this work we explore the relationship between an excited state quantum phase transition (ESQPT) and the phenomenon of ...

We investigate shape phase transitions in odd nuclei within the Interacting Boson Fermion Model. Special attention is given ...

Within the neutron-proton interacting boson model we study the population of mixed-symmetry states via α transfer processes. ...

The connections between the E(5) models [the original E(5) using an infinite square well, E(5)-β4, E(5)-β6, and E(5)-β8], ...

The scattering of a weakly bound three-body system by a target is discussed. A transformed harmonic oscillator basis is ...

We analyze the decoherence induced on a single qubit by the interaction with a two-level boson system with critical internal ...

We investigate phase transitions in boson-fermion systems. We propose an analytically solvable model [E(5/12)] to describe ...

The phase diagram of two-level boson Hamiltonians, including the interacting boson model (IBM), is studied beyond the ...

In the light of renewed interest in experiments on two-particle transfer reactions, we study the evolution of the transfer ...

The phase transition in odd nuclei when the underlying even-even core nuclei experience a transition from spherical to ...

The structure of the three-body Borromean nucleus He6 is approximated by a two-body di-neutron cluster model. The binding ...

We investigate the evolution of one-particle spectroscopic intensities as a possible signature of shape phase transitions. ...

The problem of Coulomb breakup in the scattering of a two-body loosely bound projectile by a heavy target is addressed. A ...

We introduce a simple two-level boson model with the same energy surface as the Q-consistent interacting boson model ...

We explore the Hyperspherical Harmonics pseudostate method to describe the 6He continuum. The method is use it within the multiple scattering of the transition amplitude (MST) approach to study inelastic scattering of p-6He at 700 MeV/u.

Two-level boson systems displaying a quantum phase transition from a spherical (symmetric) to a deformed (broken) phase ...

We investigate the finite-size scaling exponents for the critical point at the shape-phase transition from U(5) (spherical) ...

The phase transition around the critical point in the evolution from spherical to deformed γ-unstable shapes is investigated ...

The appropriate use of the interacting boson-fermion model one nucleon transfer operator in connection with ...

Exact numerical results of the interacting boson model Hamiltonian along the integrable line from U(5) to O(6) are obtained ...

The inclusion of the continuum in the study of weakly bound three-body systems is discussed. A transformed harmonic ...

We study the phase diagram of the proton-neutron interacting boson model with special emphasis on the phase transitions leading to triaxial phases. The existence of a new critical point between spherical and triaxial shapes is reported.

The problem of describing resonances when the continuum is represented by a discrete set of normalizable states is addressed. ...

The sextic oscillator is proposed as a two-parameter solvable g-independent potential in the Bohr Hamiltonian. It is shown ...

We study the quantum phase transition mechanisms that arise in the interacting boson model. We show that the second-order ...

The relation of the recently proposed E(5) critical point symmetry with the interacting boson model is ...

A systematic study of isotope chains in the rare-earth region is presented. For chains 60 144 2 154Nd, 62 146 2 160Sm, 64 ...

A method for discretizing the continuum by using a transformed harmonic oscillator basis has recently been presented [Phys. ...

La presente Tesis Doctoral se desarrolla en el marco de los modelos de bosones en interacción (IBM) y de bosones y fermiones ...

Double−γ vibrations in deformed nuclei are analyzed in the context of the interacting boson model. A simple extension of ...

The boson-conserving one-nucleon transfer operator in the interacting boson model (IBM) is reanalyzed. Extra ...

We carry out an interacting boson model study of the Ru isotopes using a U(5)-SO(6) transitional Hamiltonian with fixed ...

The continuum coupling in a one-dimensional scattering problem was studied within a semiclassical approach by means of a ...

The application of a recently proposed procedure for discretizing the continuum to collision processes involving ...

El propósito de esta tesis es utilizar dos métodos analíticos para la descripción vibracional de moléculas, que incluyen ...

The method of defining a transformed harmonic-oscillator (THO) basis, designed to take an account of continuum, by an ...

E2 transitions and quadrupole moments are studied in the recently proposed E~5! symmetry by using the intrinsic state ...

Double-γ vibrations in deformed nuclei are studied in the context of the interacting boson model with special reference ...

An intrinsic-state formalism for the interacting boson model IBM-4 is presented. A basis of deformed bosons is introduced ...

The coupling of the high-lying dipole mode to the low-lying quadrupole modes for the case of deformed γ-unstable nuclei ...

A general formalism for constructing configuration localized states for one-dimensional potentials is presented. It allows ...

Esta tesis doctoral abarca el análisis previo, los fundamentos de proyecto, los procedimientos para la construcción y la ...

The problem of calculating Franck-Condon overlap integrals in molecular transitions between vibrational states in different ...

A recent article by Dussel, Sofia, and Tonina studies the relation between Galilei invariance and dipole energy weighted ...

The bound states of a Morse potential are described in terms of a basis of states that are characterized for being eigenstates ...

A Hartree-Bose mean-field approximation for the IBM-3 is presented. A Hartree-Bose transformation from spherical to deformed ...

The scattering of low-energy electrons by polar molecules is considered. The excitation to the rotational states in the ...

A Hartree-Bose mean-field approximation for the IBM-3 is presented. A Hartree-Bose transformation from the spherical to ...

An algebraic method especially suited to describe the strongly anharmonic vibrational spectra in molecules may be an ...

En esta Tesis se presentan los resultados del trabajo realizado durante cuatro años en el Instituto de Ciencias Nucleares ...

A general study of excitations up to two-phonon states is carried out using the intrinsicstate formalism of the Interacting ...

An algebraic model in terms of a local harmonic boson realization was recently proposed to study molecular vibrational ...

The relation between algebraic and traditional calculations of molecular vibrations is investigated. An explicit connection between interactions in configuration space and the corresponding algebraic interactions is established.

We introduce the anharmonic oscillator symmetry model to describe vibrational excitations in molecular systems exhibiting ...

We apply a symmetry-adapted algebraic model to the vibrational excitations in D_3h and T_d molecules. A systematic procedure ...

The scattering of electrons by molecules is considered. The structure of the molecule is described in terms of the vibron ...

We present a new and consistent mapping of colorless three-quark clusters onto colorless triplet fermions (baryons) and ...

Nuclear resonance fluorescence experiments are reported to search for enhanced M1 scissors mode states in the deformed ...

The formalism of the neutron-photon interacting boson model, extended to include two-quasiparticle excitations, is used ...

We present systematic calculations on nuclei in the region around A=190 within the framework of the proton-neutron interacting ...

We analyze the nuclear structure information obtained from measurements of charge radii in even-even and even-odd nuclei ...

We present results of a calculation of properties of low-lying collective quadrupole states in odd-even nuclei within the framework of the proton-neutron interacting boson-fermion model.

Lifetimes of 17 levels of 124Xe were measured using the Recoil Distance Doppler Shift method. An anomalous E2-reduction ...