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Mostrando ítems 11-20 de 48
Artículo
Phase diagram of the two-fluid Lipkin model: A "butterfly" catastrophe
(American Physical Society, 2016-03-31)
Background: In the past few decades quantum phase transitions have been of great interest in nuclear physics. In this context, two-fluid algebraic models are ideal systems to study how the concept of quantum phase transition ...
Ponencia
Core excitation effects in the breakup of halo nuclei
(American Institute of Physics, 2012)
The role of core excitation in the structure and dynamics of two-body halo nuclei is investigated. We present calculations for the resonant breakup of 11Be on protons at an incident energy of 63.7 MeV/nucleon, where core ...
Artículo
Core excitations in the structure and reactions of halo nuclei
(EDP Sciences, 2014-03-20)
We analyse the resonant break-up of halo nuclei including possible excitations of the core both in the structure of the halo nucleus and in the reaction dynamics. The structure of the halo nucleus is treated in the ...
Artículo
Be 9 elastic scattering on Pb 208 and Al 27 within a four-body reaction framework
(American Physical Society, 2015)
We investigate low-energy Be9 elastic scattering on two different targets (heavy, light) within a four-body framework using the continuum-discretized coupled-channels (CDCC) method. The Be9 projectile is described in an ...
Artículo
Particle motion in a deformed potential using a transformed oscillator basis
(American Physical Society, 2012)
The quantum description of a particle moving in a deformed potential is investigated. A pseudostate (PS) basis is used to represent the states of the composite system. This PS basis is obtained by diagonalizing the system ...
Ponencia
A beyond mean-field study of the Tavis- Cummings model
(American Institute of Physics, 2019-09)
A beyond mean-field study of the Tavis-Cummings (TC) model is developed. This is the simplest model for describing the interaction of a radiation field with a system composed by an array of two-level atoms. The first ...
Artículo
Search for critical-point nuclei in terms of the sextic oscillator
(The American Physical Society, 2010)
The spherical to deformed γ-unstable shape transition in nuclei is discussed in terms of the sextic oscillator as a γ-independent potential in the Bohr Hamiltonian. The wave functions, energy eigenvalues, and electric ...
Artículo
Evidence of strong dynamic core excitation in 19C resonant break-up
(American Physical Society, 2016)
The resonant breakup of 19C on protons measured at RIKEN [Y. Satou et al., Phys. Lett. B 660, 320 (2008)] is analyzed in terms of a valence-core model for 19C that includes possible core excitations. The analysis of ...
Artículo
An extended Agassi model: Algebraic structure, phase diagram, and large size limit
(Institute of Physics Publishing, 2019)
The Agassi model (Agassi 1968 Nucl. Phys. A 116 49) is a schematic two-level model that involves pairing and monopole-monopole interactions. It is, therefore, an extension of the well known Lipkin-Meshkov-Glick model (Lipkin ...
Artículo
Excited-state phase transition and onset of chaos in quantum optical models
(American Physical Society, 2011)
We study the critical behavior of excited states and its relation to order and chaos in the Jaynes-Cummings and Dicke models of quantum optics. We show that both models exhibit a chain of excited-state quantum phase ...