38 citations · 152 across the 10 of their papers we have counts for
10 papers
Shape coexistence in Sr isotopes
Esperanza Maya-Barbecho, José Enrique García-Ramos
Sr isotopes are located in the mass region , where a very quick onset of nuclear deformation exists, being other notable examples of this area Yb, Zr, and Nb nuclei.…
Exceptional Spectral Phase in a Dissipative Collective Spin Model
Álvaro Rubio-García, Ángel L. Corps, Armando Relaño +4
We study a model of a quantum collective spin weakly coupled to a spin-polarized Markovian environment and find that the spectrum is divided into two regions that we name normal an…
Evolution of octupole deformation and collectivity in neutron-rich lanthanides
K. Nomura, R. Rodríguez-Guzmán, L. M. Robledo +2
The onset of octupole deformation and its impact on related spectroscopic properties is studied in even-even neutron-rich lanthanide isotopes Xe, Ba, Ce, and Nd with neutron number…
A digital quantum simulation of the Agassi model
Pedro Pérez-Fernández, José Miguel Arias, José Enrique García-Ramos +1
A digital quantum simulation of the Agassi model from nuclear physics is proposed and analyzed. The proposal is worked out for the case with four different sites. Numerical simulat…
Quadrupole-octupole coupling and the onset of octupole deformation in actinides
K. Nomura, R. Rodríguez-Guzmán, L. M. Robledo +1
The evolution of quadrupole and octupole collectivity and their coupling is investigated in a series of even-even isotopes of the actinide Ra, Th, U, Pu, Cm, and Cf with neutron nu…
The subtle connection between shape coexistence and quantum phase transition. The Zr case
J. E. García-Ramos, K. Heyde
Background: Zr region is characterized by very rapid changes in the ground state structure of the nuclei. In particular, the onset of deformation when passing from Zr to $^{…
Scaling Properties of the Lipkin Model at the Critical Point
J. M. Arias, J. E. García-Ramos
The influence of Franco Iachello in Physics during the last 50 years and, in particular, in the use of algebraic methods applied to very different physical problems has been broad,…
An extended Agassi model: algebraic structure, phase diagram, and large size limit
J. E. García-Ramos, J Dukelsky, P Pérez-Fernández +1
The Agassi model 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 (LMG…
Phase diagram of an extended Agassi model
J. E. García-Ramos, J. Dukelsky, P. Pérez-Fernández +1
Background: The Agassi model is an extension of the Lipkin-Meshkov-Glick model that incorporates the pairing interaction. It is a schematic model that describes the interplay betwe…
On the nature of the shape coexistence and the quantum phase transition phenomena: lead region and Zr isotopes
J. E. García-Ramos, K. Heyde
The goal of this contribution is to analyze the connection between shape coexistence and quantum phase transition, two seemingly unrelated phenomena that share common aspects, name…